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The Cornet ED85EX EMF Meter – My Review

Posted by Lloyd Burrell on June 15, 2011 under Cornet meter | 143 Comments to Read

For some time now I’ve been looking for the best EMF meter to measure radio-frequency (RF) or cell phone radiation.

There are a lot of ‘average’ meters out there and a few good ones. It really depends on how much you want to spend and what you want to measure.

I’d heard about the Cornet ED85EX. For me the only way to find out was to go out and buy the meter and see for myself…..cornet ed85ex emf meter

What Does The Cornet ED85EX EMF Meter Measure?

The Cornet ED85EX EMF meter is designed to measure radio-frequency (RF) radiation over a very broad frequency range – this is it’s principal strength.

Here is the technical specification:

– Frequency range : 1MHz to 8GHz (useful to 10GHz according to manufacturer)*

– Wide dynamic range : 60dB

– Sensitivity : –55dBm to 0 dBm (25mV/m to 14.8V/m)

– Peak power density measurement : 1.5uW/m2 to 0.58W/m2

– LCD graphic Histogram and Bar display shows signal power level

– Color LED 8 segment level display for easy signal level indication.

– Continue wave (AM,FM) and High speed Burst RF(GSM,TDMA,,CDMA, Wi-Fi,WiMAX)

– External SMA connector : (50ohms) for external Antenna, attenuator, and filter

– Compact hand held design, 69mmX110mm.

– Takes 9V batteries

* below 700MHz and above 6GHz an external antenna is required (not supplied).

 From What Sources Can The Cornet ED85EX Measure Radiation?

Typically this meter measures radiation from the following sources:

–          Cell phones

–          Smart meters

–          Cell phone towers (base stations)

–          WiFi routers and WIFI networks

–          Cordless (DECT) phones

–          Wimax

–          Microwave ovens

–          Spy cameras

–          Digital baby monitors

–          Digital TV

–         A/V Sender Receivers

–          Wireless burglar alarms

–          Wireless video games (Playsation 3 and the like)

–          FM radio transmissions

and more.

What I Liked About This EMF Meter

There are two things that set this meter apart from other RF meters:

–          its low price, it generally retails at under $200

–          its exceptional range

A lot of RF meters only go to 3 GHz. But more and more wireless devices operate above the 3GHz range, which can be a huge limitation. But the Cornet ED85EX EMF meter is capable of measuring RF radiation all the way from 1 MHz right up to 8 GHz. In terms of the range of measurement this meter is difficult to beat.

How To Use The Cornet ED85EX EMF Meter

Here is how you can use the Cornet ED85EX EMF meter to measure radiation in 5 easy steps:

I found it very easy to use. It comes supplied with a 9 V battery you just insert in the back, screw the antenna on and press the power button and you are away. It has both an LCD display where you can see the RF levels moving up and down as numbers and an LED display using colored lights, going from green to red, depending on the radiation levels (with red being the higher radiation levels).

This meter  can measure from 1.5 uW/m2 to 0.58 W/m2, just press on the top black button to select the mW/m² display.

How Do I Know When The RF Radiation Is At Dangerous Levels

There is much debate about what constitutes a dangerous level of RF radiation. It depends on which scientists you listen to. It also depends on whether your exposure is momentary, for instance when you go into a room with a lot of cell phones and wireless devices, or whether it is more long-term, as might be the case when you have a cell phone tower in close proximity to your home.

As far as long-term exposure goes, my own personal recommendation with this meter is that if the first yellow LED lights up when you take your readings then you should be looking for solutions to minimize your exposure.

What are the disadvantages of the Cornet ED85EX meter?

– it can only measure RF radiation

– the screen presents a lot of information which can take time to understand

– it doesn’t have an audio function, so you can’t “hear” the radiation (UPDATE August 2012: this meter now has an audio function – you can ‘hear’ the RF radiation emissions in your environment)

– it’s a single axis meter

It being a single axis meter is not necessarily a disadvantage for measuring RF radiation. It can allow you to determine where the radiation is coming from if you stand in one spot and turn the meter in different directions.

If you’re looking for a more multi-purpose EMF meter the Cornet ED78S might be a better choice for you. In addition to measuring RF radiation it also measures magnetic field radiation (in milligauss). The downside is that it measures a shorter frequency range than the ED85EX (the ED78S starts at 100MHz, so it can’t measure FM transmissions), the risk being that your true exposures are much higher than what your meter shows because the exposures are outside the frequency range of the meter. But the ED78S is a less expensive meter. Click here for my review of the Cornet ED78S meter.

Is This The Right EMF Meter For Me?

Start by asking yourself the right questions. Do you live near a cell phone tower? Or do you live in an apartment surrounded by other apartments equipped with WiFi, cordless phones and smart meters. Or is your car equipped with Bluetooth, which you don’t use, but you’re wondering if it’s still zapping you? Or maybe you’re interested in the health benefits of EMF mitigation? Or perhaps you’re displaying some of the symptoms of electrical sensitivity.

If you answered yes to any of these questions then the starting point is to take readings with an EMF meter which good measurement capability. If I had to put my finger on one thing that sets this EMF meter apart from other meters on the market it’s it’s very broad frequency range . This might sound like a small detail but it’s not.

If you take readings and your RF meter shows zero or near zero exposures because the emissions you’re trying to measure are above or below the range of the meter you’re just kidding yourself you’re in safe environment. The truth is you don’t know, which defeats the whole purpose of taking readings!

Where Can I Buy The Cornet ED85EX Meter?

The best place to buy the Cornet ED85EX is this company. I’ve bought through them and found their customer service to be exceptional (they offer a 90 day no questions asked money back guarantee – and they really do refund if you’re not satisfied) and free worldwide shipping. At under $200 this meter represents very good value. Updated July 2015.

  • Pritam Vachani said,

    Can the Cornet E85EX EMF meter be used in India? We have 50hZ here.
    Regards and Thanks – Pritam

  • Lloyd said,

    The Cornet ED85EX meter measures RF radiation which is not dependent on the frequency of your electricity supply. It can be used anywhere in the world.

  • eloise said,

    Is there another meter out there that will measure cell phone radiation, that is cheaper? In the beginning you say that there are a lot of average cell phone radiation EMF meters out there… could one of those possibly work for the same thing if you just wanted to test cell phone radiation? Also, how many GHz does a cell phone normally emit? Is it even necessary, when testing cell phones, that the meter tests all the way to 8GHz? Thank you!

  • Lloyd said,

    There are cheaper meters which will measure cell phone radiation. You really have to ask yourself what you are wanting to measure. The Cornet will give you reliable measurements and it has a high level of sensitivity – the Cornet will pick up signals some cheaper meters won’t even detect. It depends where you live but cell phones are usually operating in the 850 to 1900 Mhz (that’s 0.85 to 1.9Ghz) but the frequencies used for these wireless technologies are going higher all the time, some new WiFi and cordless phones are operating in the 5.8Ghz range. With the Cornet you are covered.

  • Diane said,

    I want to know if this RF Meter will disclose where the Smart Chips are in new appliances and other electronics to allow for their removal?

  • Lloyd said,

    Yes this meter will tell you if your electrical appliance has an RF power transmitter fitted but these chips are an integral part of the machine. If you did manage to remove it your guarantee would be invalidated – better to test before buying.

  • Julia said,

    Lloyd, thank you so much for your excellent work.

    As an electrohypersensitive, I’d like to update my good old electrosmog meter (50MHZ – 3.5 GHZ) with an easily portable meter, able to catch up to 8 GHZ.
    Both the Acoustimeter MW AM10 and the Cornet ED85E looked very interesting and promising.

    However, when looking closer at your videos to try to figure out what was the minimum signal either meters were able to pick, I was not sure I could read or translate properly.
    That is : I am comfortable with a (tri-directional) reading of 8 to 12 mV/m or 0.2 mu W/m2 or 25 mu A/m on my Electrosmog meter. I start perceiving some discomfort from 12mV/m on.

    If I really have to (airport or public place), I can last about 2 hours in a 120 mV/m environment but it would certainly help to be informed also of these relatively low levels between (12 and 120 mV/m) exposures to optimize my autonomy and relocate quicker to a safer spot.

    On the Cornet description it says :
    The Cornet ED85EX EMF meter can measure from 1.5 uW/m2 (which seems much less sensitive than the electrosmog meter) to 0.58 W/m2, but the LCD screen on the video looked more like 0,001 mu W/m2 ? Which one is correct ?.

    On the acoustimeter’s description, it says :
    Sensitivity* (Peak Display): 0.02 V/m – 6.00 V/m
    Sensitivity* (Average Display): 1 µW/m2 – 100,000 µW/m2
    * audio may be produced at levels below 0.02 V/m
    If that really translates to 20 mV/m , it should work for me outside of my home.

    Would you be so kind to cross check this information and let me know your opinion ?

    Many, many thanks

  • Lloyd said,

    Hi Julia
    The minimum frequencies that can be measured by the meters I review are:
    for the Acoustimeter: 200 MHz
    for theCornet ED85EX: 1MHz
    So the ED85EX can measure in a lower frequency range than the Acoustimeter.
    You said:“I am comfortable with a (tri-directional) reading of 8 to 12 mV/m or 0.2 mu W/m2 or 25 mu A/m”.
    The measurement sensitivity of both the meters I review is 20 mV/m (or 1.5µW/m2).
    Going on what you are saying to me, you are reacting to an electric field strength (V/m) or PFD (μW/m2) of “12m/V on”, which is lower than what either the Acoustimeter or ED85EX are designed to measure. In which case I can’t see what you would gain by buying either the Acoustimeter or the ED85EX.

    BTW: What you can see on the ED85EX video is 0.001mW/m². (0.001mW/m² (milliwatts) equals 1 µW/m2 microWatts)….when I compare the readings given by the Acoustimeter to those of the ED85EX at these extremely low levels, I have found the Acoustimeter to be more sensitive than the ED85EX.

  • Mr G said,

    Ive been using this one for the last couple of years it works well. I have replaced the arial with a more robust one.

  • Les Gripkey said,

    To get accurate cell phone radiation readings with this Cornet do you need some type of protected tray to place the phone in/on? If so, what should it be made of? If not, how do you get most accurate readings?

    (And BTW, I got my Cornet through your recommended link and did get very good service).
    Thanks, Les

  • Lloyd said,

    Hi Les
    Ideally you would place your cell phone on a bracket (something like the devices that are sold to hold cell phones in cars) so that you can get readings from the front, back, and sides with your meter. Or you can just place it on a flat surface but there will be one side you cannot measure.
    Then hold your meter at 0cm from each side of the cell phone, note your measurements, do the same at 1cm, 2cm etc., note your readings. This will help you understand the importance of proximity with EMF exposure.
    Now do the same in call mode and the same again in text mode.

  • Cathy said,

    Hi Lloyd,
    I am mainly for testing the WIFI hotspot radiation, and looking for a easy to use one even for a dummy, which one should I buy? Cornet ED75 or Cornet ED 85EX? Or is there another better one?

  • Lloyd said,

    Hi Cathy
    It depends what you are looking for. Both the ED75 and ED85EX will measure WiFi radiation admirably. The Acoustimeter has more to offer (sensitivity and audio function) but then its more expensive.

  • Cathy said,

    Thanks for your reply, Lloyd.

  • ANTON said,

    Hi Lloyd
    I’ve read your explanations about different measurements. You mention that -V/m- is more accurate unit to measure Radio/Microwaves. On my CORNET ED85EX I understand- mW/m2- and-V/m-but I do not understand what is –dbm. ( I am not sure whether this is important ) My question is- If I measure in -V/m- do I just refer to the green, yellow and red lights or do I have to record MAX Reading and convert to something else. I would also like to find out what is the RF signal level. (is this the some as RF power density.
    Thanks for your help.

  • Lloyd said,

    Hi Anton
    Yes you can just look at the green, yellow and green LEDs, the idea of these lights is to give meaning to the reading that you can see in the LCD display (the main display). The Cornet meter measures exclusively RF signals – in different units of measurement. mW/m² measures Power Flux Density – for an explanation see
    dBm means decibels referenced to 1 milliwatts, these measurement units are not suitable for the type of measuring we are interested (non thermal levels of non-ionizing radiation).

  • CoffeeBean said,

    Hello Lloyd, This is an excellent website. I am on the fence about this issue of cell tower radiation, but cautious about cell phones. However, from my apartment, about 200m away, and 4 floors below, I can see a cell tower (I live in an American city, downtown). Would you recommend that I buy the Cornet ED85EX Meter to measure the potential RF from this tower? Thanks much!

  • Lloyd said,

    Yes, I would recommend that you purchase an RF meter. And the ED85 is a good choice. This will open your eyes to the dangers and to the levels of RF radiation you are currently exposing yourself to, not just from the cell tower but from other sources – the cell tower is just one source of EMF pollution amongst many.

  • Katya said,

    HI Lloyd,

    Thanks so much for all your effort in putting together such good information on this topic, and being available to help people with their questions!

    I am just learning about EMF radiation issues. I am generally interested in health and wellbeing, will soon be buying a home, and have young child. I am interested in finding a home with low EMF issues around it, then minimizing exposure due to our own appliances and choices within the home. I am interested in wifi type exposure (i think this is RF) as well as some of the LF issues. If I were to buy one reader, which would you recommend? I am thinking I may need to buy two readers (would you agree?). If I were to buy two readers (to adequately assess RF and LF) which two would you recommend?

    Thank you very much!
    Best regards,

  • Lloyd said,

    Hi Katya
    There is no one meter that does everything unfortunately, its all about a trade off between price and performance, so if you pay less you get less….accuracy, sensitivity, range of measurement etc. If I were starting out, I had no symptoms of electrical sensitivity, I would buy one meter first, a not too expensive one, read the reviews, if your main worry is WiFi this does narrow the field.

  • Josh said,


    I am planning on opening a small kiosk in my local mall selling air tube headsets to combat cell phone radiation. I was wondering which model you think would be the best for showing customers their cell phone radiation readings so they’ll see why they shouldn’t put it to their heads. I’m planning on purchasing the 100xe for home use, and thought the ed85ex might be the best choice for this, but wanted your opinion since you seem to be quite knowledgable. I’d like to stay under $300 for the mall model, unless there’s something that would MUCH better. Thanks for your advice!

  • Lloyd said,

    Hi Josh
    There is no “best” EMF meter. Its all about trade offs between price and performance. As an electrosensitive my personal preference is the Acoustimeter but the ED85EX is a great little (more portable than the Acoustimeter) RF meter, for the price, and it will measure cell phone radiation admirably.

  • Serge said,

    Tkx Lloyd,

    I wrote recently in the Cornet ED75 section of your site, and, given your answer, I purchased the 85EX last sunday which arrived in the mail… friday! Not bad, especially considering that the Atlantic had to be crossed!

    I sarted my readings. I found out, among others, that the base for our old cordless phone emits more microwatts per m2 than a friend’s brand new cell phone! I’m very likely to disconnect this cordless kit and to put back in service our “old style phones”.

    But I have a question. I asked this friend to call my 6 yrs old Motorolla cell phone, and when I answered I got many readings between 130 and 195 mw per m2, with a maximum of 210;

    Then he called a 4 yrs old cell phone of the “LG” brand and I got measures that looked a bit lower, like most of them between 80 and 170, with a max of 205;

    thirdly he “called” his bran new HTC android phone and the measures were mostly between 5 and 20, with a maximum of… 68.

    Here’s my question : can I conclude from these 3 sets of measurings that using a cell phonne of the new generation is, per minute of use, less toxic than an older one?

    Tkx again!


  • Lloyd said,

    Hi Serge
    You would need to test the phones under controlled laboratory conditions with professional EMF testing equipment to get reliable results, the ED85EX is a consumer unit…there is a margin of error. Nevertheless I see the point of your question but unfortunately there are many other parameters… Like what technology the phone is using, 2G or 3G. 3G (which is what I suspect the more recent phone is) is more about superior data transfer, it uses different technology to 2G and operates on a slightly different frequency. We know that some frequencies impact our health more than others. Then there are the questions of modulation (a second frequency, known as modulation, is embedded in the carrier signal which work at extra low frequencies and are known to be particularly harmful) and pulsation (the rate of change of these pulses with extremely rapid rise and fall times, is thought to do most of the biological damage). We don’t know what modulation and pulsation technologies these phones are using. What is true is that more modern phones are far more efficient than older versions so rather than cranking out at full power all the time they adapt to the signal (see Its not cut and dried at all.

  • mike said,

    Hi Lloyd,

    I purchased my 1st meter, which is a Cornet ED85EX w/ sound. I live .22 miles (354 meters) away from the nearest cell tower. It was constructed on 04/10 and I experienced ringing in the ear a month later (which lasted 1 month 24/7).

    Starting in 1/12, I started to suffer from vertigo and severe dizziness. I know there is other causes of vertigo, but I feel it may be caused by EMF’s.

    In 7/12, I took a pill an hour prior to my 1st doctor’s appointment and felt fine. Got to the hospital and started to feel really bad. So bad, I thought I was gonna have a severe vertigo attack.

    I’ve had 2 of these and they are horrible. I didn’t realize all the EMF’s I was being exposed to at the hospital.

    Anyways, I’d like to try different antennas for certain frequencies. And maybe different filters too.

    Would be great if you made a list of EMF radiation and the basic frequencies they are on.

    Thanks for this website/info.

  • Lloyd said,

    Hi Mike
    Fair point. I give an overview of the different frequencies that different electrical devices use in this article

  • mod said,

    Hi Lloyd,

    I purchased one of these ED85EX meters for measuring 2.4Ghz at home. It came with standard 2.4Ghz antenna.

    Now I need to measure a TV/Radio FM tower close to my office.
    Will the ED85EX measure vhf without an antenna?
    Do I need a different antenna for 88 to 108 Mhz?
    Can you point me somewhere for more info.


  • Lloyd said,

    Hi Mod
    The Cornet ED85EX has a special antenna (TELE5) which is a telescopic antenna with adjustable length that is more adapted to the low frequencies of FM broadcasts. It looks like an FM home radio antenna, but it has an SMA connector to fit the ED85EX. The price is around $40.

  • Mike said,

    Hi Lloyd,

    Mike here again. Just got my ED85EXS. I already covered and grounded my WiFi router 2 days ago. Cut down on some radiation emitting from it.

    The router is located in the den. I have a room in the back and spent most of my time sitting/sleeping near the wall closest to the router.

    For 4 years I’ve been exposing myself to harmful radiation. Moved the room around yesterday.

    Now, on the other side of the room the meter is averaging .06 v/m. But, every 20 seconds it would jump to .8 and higher (2 yellow bars).

    It would do this for a few seconds, then drop off. It’s not pulsing like a WiFi signal. Any idea what it can be?

    The door and window on this side lead to the driveway (opposite direction of the cell tower I mentioned earlier).


  • Lloyd said,

    Hi Mike
    Cell towers typically emit pulsed signals but the pulsing interval is usually measured in milliseconds, I am not familiar with a pulsing interval which lasts 20 seconds – this is not to say it does not exist, your meter is saying it does. The readings you are getting might sound quite low (the Bioinitiative report recommends a maximum of 0.19 Volts/meter for indoor exposure) but as an electrosensitive I would not be happy spending long periods of time in an environment even where I was being continually exposed to RF radiation at 0.06 V/m. If you can’t move out of the room I would suggest shielding, see

  • Mike said,

    Hi Lloyd,

    Thanks for the info. It was the WiFi on my laptop. Since I got my meter in Sept., I’ve moved the room around, shielded the router, removed the game system from the den, put fine mesh aluminum screening in my room (and grounded it) near my bed, got ethernet cable for laptop, etc.

    The screen cuts down 1/4 of the signal coming in. Not great, but better than before. But here is my concern. Since I’ve been protecting/shielding myself, it seems as if I’ve become more sensitive.

    Is this to be expected? I’ve even gone through a heavy metals detox which took away the severe tension in my back/neck.


  • Lloyd said,

    Hi Mike
    It took me years to stabilize, to find solid ground from where I could move forward and get where I am today. Its a roller coaster ride. The first step in dealing with ES is to take EMF reduction to the nth degree, there is no set rule for knowing what levels of EMFs your body can tolerate well. The next step is taking your nutrition to the nth degree, see and
    From what you are saying you do seem to be moving in the right direction…

  • Serge said,

    Hi again Lloyd,

    Late August I bought an ED85EX meter in order mainly to measure the radiation in and around my cabin in the country. Five months before a company built a cell tower 1000 feet away from this humble, simple, basic-needs-house with a beautiful view on blue mountains. Now the vista is on this “alien” giant thing.

    I still liked the house dough, and if the radiation level inside and around the house was not too horribly high, I would keep it and proceed to some repairs instead of selling it right away. (the stupid thing is that this small village’s only economy is tourism, and that these people massively said “yes” to the tower (well at least the few consulted… Anyway.)

    I finally had a chance to make the readings recently with my ED85EX, and they are soooo surprisingly low that I feel I need your opinion. Among other questions : is it possible that a “possibly new technology involved in this tower” make it impossible for my meter to detect all the radiation coming from it? I know very little about this tower exept that it’s ugly, and that only those who buy G4 phones can acces the servicing from the tower (we used to have NO cellular service in these mountains!). Also it is certainly not a tower “processing” as much info as those downtown in giant cities… thise village has 500 inhabitants, and the chain of 5 or 6 villages along this rural road must count as less as 3500 or 4000 people, all this in a very remote, low populated area, away from any big city.

    My house is in an abrupt and long slope. The tower, approx 1000 feet distant, is lower in the slope. It is 285 feet high was I told, but due to the slope, at the eyes level when I’m in my house I arrive at approx the first third of the tower, so that, for my house, it’s like if the top of the tower was at 200 feet instead of 280 (in case these details have any importance).

    Here are my readings. They are all given in distance to the tower. The numbers in parenthesis correspond to the maximum read by the machine at each site. I also noted the dBm and the V/m readings at every spot, so that if you need these infos I can provide them : )

    At 100 feet approximatively (the closest I can get to the tower; apparently there I was inside the “cone”) : regular readings around 0.001 mW/m2 (maximum read : 0.005).

    At 500 feet approx : regular readings around 0.01 (max : 0.03).

    At 1000 feet approx (right outside my house, still doing my best to point the antenna in the direction of the tower and then keeping moving a little from right to left and from up to down inn order to get the higher readings) : regular readings around 0.03 (max : 0.07).

    Up the hill, at approx 1800 or 2000 feet from the tower : regular readings around 0.005 (maximum : 0.02).

    I stayed like 1/2 to 2 minutes at each of these spots.

    Lloyd, do these readings appear “normal” to you? I mean, I feel so lucky if I can rely on these readings, compared to some other of my readings! I mean : our cordless phone’s base was emitting so high (180 to 240 mW/m2 while in communication, at approx 5 cm) that I just scrapped it, and my ol’ Motorolla, since it’s emitting 160 to 210 while in communication, is now off most of the time and turned on only if I desesperatly need to make a call and have no other option available. Jeez what I recieve from that tower while at my cabin is like five thousand times lower!!!

    Here comes my second concern : is it possible my meter is “fucked up” and doesn’t give reliable readings (of course I’m conscious that a 5000$ meter would give more precise readings; my concern is : would I get similar readngs with ANY ED85EX meter?)? At least my cell and my cordless are still giving readings very similar to when I first measured them, and they are the very first items I measured in August!

    Here will be all the readings for all the devices I measured so far. Question : do these readings appear “normal” to you or is there something “suspect”? I’m trying here to figure if I can “trust” my ED85EX readings on the cell tower… Exept if mentioned all the readings are approx at a 5 cm distance.

    Cellular phones during a call : my 5 years old cell, regular readings 160 mW/m2 (max 210); android or “intelligent” phone, very recent, regular readings around 11 (max 24); older good quality phone, 4 yrs old, 125 (max 205); recently “acquired” Nokia cell with a cheap 2 yrs contract, 170 (max 240).

    A router with the wifi option “on”, at 3 feet distance from the router : 40 (50).

    My laptop when wifi connected (1 feet distance): 20 (40).

    Microwave ovens, none of them new : 300 (380); 350 (480); 450 (580). (These were measured after putting a cup of water in, then pressed 1:11 seconds, then power turned on).

    Cordless phone’s bases when a call is made :
    mine : 180 (240); 3 (5); 7 (12)!!! These are all cordless phones bases while in use! Stunning differences, as for the cells!

    Thanks for your answer Lloyd, If it’s ok with you I’ll send a copy or link to an accointance who is at the “communications” for a citizen’s group opposed to “smart” electrical meters; He’s the one who told me about your site when I was asking him which EMF meter to buy : )


  • Lloyd said,

    Hi Serge
    The cell tower in question would appear to be one of the new 4G towers. Information on the 4G network is still sketchy at the moment, particularly in terms of its impact on our health. 4G is all about offering superior data transfer capabilities (100-Mbits/second), this much is known, but then how exactly this is achieved differs from country to country and operator to operator. We also know the transmissions are in the 800 MHz and 2.6 GHz band. The ED85EX is designed to measure in the range 1MHz to 8GHz. So it is well suited to measuring these frequencies –no problem on that score.
    Now regarding the readings of the tower, you are asking me if these readings appear normal? You are seeing that the readings are higher at 1000 feet (0.03 (max : 0.07)) from the tower than they are at 100 feet (0.001 mW/m2 (max: 0.005)). This is feasible. RF Exposures depend on a lot of factors. Where the main beam falls is of significant importance. This is very difficult to predict – depends on local geography and building materials. What you are describing would indicate that the main beam falls at around 1000 feet because the readings fall off again at 2000 feet.
    Your next question, is it possible that your meter is not giving reliable readings? Meters can give incorrect readings and require re-calibrating but this usually happens after time. I suspect this is not the case with yours because as you said you are obtaining the same readings for your cell phone and cordless phone now as you were when you first bought it.
    You ask me can you trust your meter? The readings you are giving me do seem plausible; I have had to convert them into V/m to get a sense of their magnitude, for instance when I tested a DECT cordless phone at 1m I obtained a reading of 3 V/m, you obtained 8V/m (approx.) at 5cm.
    I am guessing you are surprised that the cell tower readings are so low compared to things like cordless phones emissions – around 200,000 times more powerful in this example…well this is exactly the point I make to people when they voice concerns over cell towers.
    If you are still in doubt about the reliability of your RF meter readings then you can either get your meter re-calibrated or hire/borrow/buy another RF meter to make comparative readings…

  • Serge said,

    Tkx Lloyd your answer is very helpful! Given that your answer reinforces my own thoughts / intuitions, I don’t think my meter needs to be recalebrated or cross-checked at this time.

    Tkx again, Serge

  • Basith said,

    Hi Lloyd,

    There is a cell tower on a building accross the street. and the horizontal distance between my bedroom and the tower is merely 40 Feet. I live in the 1st Floor and the height of the tower is about 80 Feet.

    And my bedroom wall faces directly towards the Tower. I am really concerned as I have a 4 Year Old Kid and my wife is carrying.

    What is the best and most cost effective way to protect my family from hazards of the radiation.

    I have cronic Migraine but I used to get pain only once in 2-3 Months. But I see a sudden spike in my Migraine Headaches. I am getting migraine attacks almost everyday from past few weeks. Wondering if the radiation from the tower is triggering the Migraine.

    Please advise


  • Lloyd said,

    Hi Basith
    Its very likely that you are being exposed to RF radiation from the cell tower. But whether this exposure is causing your headaches or not is another matter. It depends on the type of antennas on the cell tower, which way they are pointing, their power outputs and other factors – EMFs rarely work in isolation to cause harm in your body, their will usually be other toxins present in your system. For my EMF shielding tips, see

  • Cynthia said,

    I really appreciate this site and the comments thread. I just got my Cornet ED85EX today. I work at a broadcast studio chock full of computers and phone equipment and it’s been interesting walking around measuring stuff, but I’m really at sea with the measurements, so thank god for those little lights.
    Here’s my question: the Bioinitiative report recommends a maximum of 0.19 Volts/meter for indoor exposure as you said above.

    But how does Volts per meter compare with the mW/m2 (milliwatts per meter squared..) measured on the rf meter?


  • Lloyd said,

    Hi Cynthia
    0.19V/m equates to 0.1 mW/m² on your Cornet meter
    My model of ED85EX doesn’t measure in V/m but my understanding is that the latest version does, so I would check this out.

  • Bob said,

    Lloyd, I was notified by Comcast of a “signal
    leakage” and would terminate service due to FCC
    rules if not corrected. My house is extensively
    cabled with coax, but from many years ago probably
    with crimped connectors and uncertain splitters.
    Depending upon Comcast measurements I can replace
    house coax with direct (quality) coax runs to
    pass testing but may then have to test all the
    house wiring to identify/replace problem areas.
    Would the Cornet ED85EX be the best meter for
    testing my cabling?

  • Lloyd said,

    Hi Bob
    It depends on the frequency of the ‘signal leakage’. Ask Comcast what frequency this leakage is at, ask them how they tested for this. If its an RF radiation problem the ED85EX measures in the range 1MHz to 8GHz, so you are well covered.

  • Sharon Phillips said,

    Hi Lloyd,

    How are you?

    I’m confused about readings I’m getting from the Cornet ED85EX RF Meter.

    In the video about the Vermont school, the meter gives readings in MV/m. Is this milli Volts/meter?

    The Cornet ED85EX RF Meter gives readings in V/M. I’m assuming this is Volts/meter, and that to convert to MV/m, all I have to do is move the decimal point 3 places to the right (for example, 3 V/M = 3000 MV/m).

    The reason I think I might be confused about the above is because I’m getting bizarre readings on my Cornet meter.

    A reading inside my daughter’s house was 24.6 V/M, which I converted to 24600 MV/M. I got this reading no matter where I stood in the house if I pointed meter in a certain direction. But my daughter is .21 miles away from the nearest cell phone tower. (I looked it up on, and she doesn’t have WIFI in her home or a Smart Meter.

    Therefore, I don’t understand how the reading could be this high. Am I misinterpreting the readings on the Cornet?

    Another reason that I think I might be misinterpreting is because the histogram (on the right-hand side of the screen) did not indicate a high reading, and the red light did not come on).

    I tried calling (and emailing) mfg of Cornet but got not response.

    Also, would you happen to know which meter was used in the video about the Vermont school? I may want to order this one.

    Thanks so much,


  • Lloyd said,

    Hi Sharon
    mV/m means millivolts per meter. So, yes 3 V/m = 3000 mV/m. And yes your readings do sound very high. My meter is an older version which does not have the V/m function on it. Are you sure its 24.6 V/m and not 24.6 mV/m – according to the technical specification the ED85EX only measures up to 14.8 V/m. Try converting your display into mW/2 and see what the reading is. I’m not familiar with the meter used in the video but if you bought the Cornet through the link on my website you would have bought through Radmeters who have a 90 day money back guarantee – so plenty of time to get a refund.

  • Mary said,

    Many thanks for your great website! It is a lot of help.

    Now that the latest version of the Cornet ED85EX EMF meter also gives readings in volts/meter, does that mean it will pick up the peaks in a digital signal (i.e. the main advantage you claim the Acoustimeter has over the Cornet)?

    Thank you


  • Lloyd said,

    Hi Mary
    V/m measures peak signal strength, yes. The Acoustimeter is also slightly more sensitive than the ED85EX.

  • Ester said,


    Can this Cornet ED85EX be used without the antennae?

  • Lloyd said,

    Hi Ester
    I wouldn’t advise it. This device is a highly sensitive piece of equipment designed to be used with an antenna, using it without an antenna could be very misleading.

  • Ester said,

    Okay Lloyd. I have been looking for a handheld Rf meter that I can bring in my purse due to my electrosensitivity.
    Like someone said above, some of these RF meters can look big and bulky, and like a science experiment when you take one take one out. I would like to avoid that in public. I am very sensitive radio and microwave signals. I looked at the other Cornet model, the ED75, but I am unsure if it covers all radio signals and all tv signals?

    Also, I am trying to google and find out what toxins we electrosensitives have in our bodies to make us ES? I myself have become ES due to a wifi box installed near the bedroom. I have a hard time finding information. I am wondering if it is mercury, if that is correct can you explain how one can get mercury in the body from wifi? Thanks so much Lloyd!

  • Lloyd said,

    The Cornet meters are fairly compact. The antenna screws on and off so you can just screw it on when you want to test. If you are mainly concerned with radio and microwave signals the ED85EX is probably the better choice….its more accurate and has a broader frequency range 1MHz to 8GHz (useful to 10GHz according to manufacturer) than the ED75 (which is 100MHz to 6GHz, useful up to 8GHz). On the one hand EMFs are a toxin, but on the the other (possibly bigger issue) is the interaction between EMFs and toxins, and notably heavy metals….Genuis has covered this in a recent research paper, see

  • Mandar said,


    Thanks for a detailed review.
    I am planning to buy this meter but I came to know that even if this is a broadband meter, at times it may not provide a cumulative reading.

    So for example, I have a GSM 900, GSM 1800 and a wifi signal, i would like to know what is the cumulative radiation of all these signals. but the company sales guy emailed me that at times the equipment just picks up the dominant signal and may not give a total of all signals.

    is this true?
    I stay in an area which has multiple mobile towers and I need to know the exact EMF radiation.

    Please guide me in buying the correct meter?

    Thanks a lot.


  • Lloyd said,

    Hi Mandar
    Buying an EMF meter is all about trade-offs. If you are wanting to know “exact EMF radiation” you need to spend a lot more than a few hundred dollars, a spectrum analyzer would give you this information…and then you would have to know how to interpret it.
    I have found this meter to do its job well….it is a broadband meter…it measures a range of frequencies and then gives you a single reading for them all.

  • mike said,


    The meter(s) detect RF radiation, not radio or tv. And do a heavy metals detox.

    I was getting a lot of neck/back ache. I got a neodymium magnet and it literally stuck to my back where I was having the aches.

    Did a heavy metals detox and the aches went away. Magnet doesn’t stick no more. :)

  • Lloyd said,

    I also experienced a spectacular turnaround in my symptoms following my first cleanse…diet and detox is hugely important.
    The Cornet ED85EX has a frequency range of 1MHz to 8GHz…so it can measure radio and TV signals – they operate in the MHz range ,see

  • Mike said,

    Hi Lloyd,

    I forgot once that I picked up a local radio station w/ the meter.

    Came in pretty clear w/ the built in speaker. Not a strong signal, but enough to be detected.

  • janet said,

    Hi Lloyd,
    Thanks so much for all your work on this !

    I was wondering if having a pro come to evaluate the house for 4oo$, then install the G/S filters where required (I estimated another 400 $ based on price per item) would be a good expenditure of money, rather than buying the rf meters etc…so depressing – i didn’t know which to do first – get my mercury fillings out or do the house. I wonder if I am more suseptible because of fillings. haha ( you never know)

  • Lloyd said,

    Hi Janet
    An EMF consultant is the quick and easy solution (ask what they test before the visit and get a written quote), the downside is it makes you reliant on someone else and you are not able to test whenever you want….the EMFs in your home are not static. If you decide to do the testing yourself my free report has some good information on this. Having your mercury fillings removed should only be done as a last resort…I’ve still got mine and I’m living with them quite happily.

  • Helder said,

    Hi Llloyd,

    Great website, thanks for it.

    I want to buy a RF meter to detect WiFi radiation around the house. I believe I am Electric Sensitive but I don’t get to choose about WiFi in the house so there are a lot of router and WiFi boxes lying around for “coverage”, and also cordless phones. Would this Cornet meter help me see if I am being affected in the bedroom?

    Also, I see there are new ones out, like the Cornet ED79S, which has a smaller RF range but also measures Low Frequency EMFs. But I also have the Trifield 100XE, so I guess the Cornet ED85EXS would be preferable to measure the WiFi radiation? And is the Acoustimeter better for this than the Cornet?

    Also I found that is offline, I can’t open the page of their store. Maybe they went out of business? Do you recommend another place to buy the Cornet meter?


  • Lloyd said,

    Hi Helder
    An RF meter will tell you the radiation levels in your bedroom, it will give you a reading. It won’t tell you if you are being ‘affected’ in the bedroom….if you have symptoms you already know this to be the case….the RF meter will enable you to take remedial action. If you’ve already got the Trifield then the ED85EX makes more sense….the Acoustimeter is more sensitive than any of the Cornets I’ve tested…but then its more expensive. Radmeters site is online – try in a different browser.

  • Helder said,

    Hi Lloyd, thank you for the very helpful reply.

    I also found this website to buy form the UK. I am in Europe so it will save me customs taxes:

    I would like to buy the ED85EX meter but I would like it with audio signalling (to warn me by audio bips the level of radiation – this is how it works correct?) and I am a bit confused. Is the ED85EXS the same model but with audio? In that store there is the ED85EX and the ED85EXS. Thank you.

  • Lloyd said,

    Hi Helder
    My review is on the ED85EX (no audio) the difference with the ED85EXS is that it has the audio function. I am also in Europe, I have not had to pay to Customs taxes on any of my purchases from Radmeters.

  • Olivo said,

    Hi EMF teacher, my name is Olivo, I’m a Medical Doctor and I’m learning all I can about EMF health effects and how to help people on this subject. So I need your advice, first: what books do you recommend to learn the best about all this and in wich order, and second: I bought a Trifield 100XE meter and I’m torn between buying the RF meter Cornet ED85EXS or the new Cornet ED78S, I see that you already know about the new one so I need you to advise me on that as well. Thanks in advance and thanks for all the info you make available to all of us. You are a Godsent.

  • Lloyd said,

    Hi Olivo
    There are quite a few books on EMFs and health that are good, see add Electromagnetic Fields by Blake Levitt to this list. As for understanding electrical sensitivity and being able to give concrete advise to your patients on how to deal with it, the best book is the one I wrote….it has meter reviews,detailed advice on dealing with EMFs in the home….. (the link is top of the page). if you’ve got the Trifield I’d go for the ED85EXS or the ED78S…I’ll be doing a video review in the coming weeks.

  • Andrew said,

    Lloyd, could you give an idea of when you plan to review the new Cornet ED78S? is selling it for a reasonable price in the US, but I’d prefer to get your assessment before purchase. I recently purchased and returned the Trifield 100XE as I am looking for more RF sensitivity, but still want some magnetic capabilities. The ED78S specs seem to suggest it’s a good compromise price/performance in this regard – but prefer to await your analysis/recommendations. Thank you.

  • Lloyd said,

    Hi Andrew
    It could be a couple of weeks still before I get my review up….it’s on the top of my “to do” list.

  • Olivo said,

    Thanks a lot for your reply Mr. Lloyd, I don’t finde the book that you wrote on the top of the page, could you please provide me with the link, or the name of the book or a precise location to find it.
    Thanks again. God bless you.

  • Olivo said,

    Ok, sorry, I found it at the left of the page. How can I buy it?

  • Lloyd said,

    To buy the book, click on the link. The link appears about one minute into the video on this page

  • Hayley said,

    Hello Lloyd thanks for your great site. I have the Cornet ED78G and I have a question for you. When I lie the meter horizontal (as per the instructions for taking a LF reading) the reading is always lower than when I hold it upright. Can you please tell me which reading would be correct. When I hold it upright the reading is always worse (i.e. higher) than when it ‘s horizontal, but I don’t want to take incorrect readings. Thanks, Hayley

  • Lloyd said,

    Hi Hayley
    When using these kinds of meters you need to hold the meter in different positions…the maximum reading is of most interest….it gives you an indication of the maximum that your body is being exposed to.

  • Lou said,

    Hi Lloyd,

    I took in a couple of reviews on EMF meters.
    You seem very high on the Acoustimeter AM-10, and it has the ability to detect smaller amounts of RF. I believe that you state that it is good for smart meter measurement; however, I read elsewhere (Ebay ad from an affilitate) that you have to be careful to not have the meter in a situation where there is too much RF (as manufacturer apparently warns of this). Thus said, I don’t see how it would not be overpowered being right in front of a smart meter which can give off extremely large levels of RF. See this video please:

    So, would the Acoustimeter be overwhelmed with that much RF (70 000)?

    The Cornet ED78S seems ideal since you have two machines in one; however, the RF detection does not seem to be near as low as the Acoustimeter AM-10—correct? It is almost like Cornet wants to allow a person to be exposed to a certain amount of RF, which they obviously feel is safe.

    Have you reviewed any meters that can go low like the Acoustimeter (or lower) and that can easily handle much, much higher fields?

    I want something that will measure the lowest amount in the home, and I also want to go out and measure smart meters, cell towers, power lines, etc.

    Thanks for your reply,

    Take Care!

  • Lloyd said,

    Hi Lou
    Would the Acoustimeter be overwhelmed at (70 000)? I don’t know I’ve never tried it…don’t start by putting your meter a few centimeters from the smart meter….start 6 or 10 feet away and move in…. I’ve had my Acoustimeter in lots of situations and its not been overwhelmed. ED78S vs Acoustimeter….the Acoustimeter is more sensitive hence the price difference.

  • Tiffany said,

    Hi Lloyd,

    I am confused as to the safety levels. You mentioned .02 V/m being a safe limit. However, the BioInitiative report gives up to .19 V/m as being a safe level, is that correct or is it .019? If correct, isn’t that a broad range? We have a cell tower about 600m from us and we are getting readings from the Cornet for up to .20 V/m in our front yard and garage. Inside our home measures below the .02 V/m as we have a well constructed home with radiant barrier sheathing and building materials. How concerned should I be about the levels in our front yard/garage?

  • Lloyd said,

    Hi Tiffany
    The BioInitiative Report 2007 recommended a limit of 0.01 μW/cm2 ( 0.19 Volts/meter) for indoor exposure.This has now been superseded by the BioInitiative Report 2012 report, which recommends a precautionary level of 0.0003 μW/cm2 to 0.0006 μW/cm2…..several magnitudes lower. In your home the levels are below 0.02 V/m….this can be considered low….the BioInitiative Report uses the words ‘precautionary limit’….because its impossible to say whats truly safe….it depends on so many factors….biological, atmospheric….anyway, I wouldn’t be overly concerned with the levels in your yard/garage unless you are spending long periods of time in those places.

  • Tiffany said,

    Thanks Lloyd, so those 2012 precautionary level recommendations would be equivalent to .03- .04 V/m correct? Is that for indoors recommendations as well?

  • Lloyd said,

    I haven’t calculated it exactly in V/m…..but much lower than that…..the 2012 precautionary are approx three orders of magnitude lower than the previous ones ….so low that none of the meters I use can effectively measure it….
    See my article on the BioInitiative Report 2012 here

  • Valera said,

    Something of interest for everyone. I’ve approached the manufacturer about ED85EXS to find out about the frequency range with the supplied antenna. Contrary to the easily misunderstood specifications, the ED85EX meter does not read the full frequency range (1MHz-8GHz) with the supplied antenna, but only 700MHz to 6GHz. Additional antennae are required to read the full frequency range. So many users may be confused about the frequency coverage of their measurements. You may also wish to amend your reviews with this information. The explanation from Cornet is quoted below for reference.

    I’ve ended up purchasing the new ED78S and find it to be an excellent meter. The functionality is a breakthrough for the price. It is easy to discern between peaks and averages, and to analyze multiple simultaneous RF sources. Having a built in LF function is a nice bonus for checking appliances and overhead power lines. And last but not least, taking measurements with ED78S in public places looks far less conspicuous than with many other meters – unless inspected closely it looks not much different from a typical tech gadget that many people carry around.


    “The ED85EXS does not have build-in internal antenna unit, it has external SMA connector to connect to external antenna units, the meter itself covers 1MHz-8GHz. from SMA connector direct input,. you can connect the signal from RF devices directly to the ED85EXS SMA connector for RF power level measurement, the frequency coverage for direct input is from1MHz to 8GHz.

    If you are doing the RF field strength measurement, You need to connect an external antenna to the ED85EXS and the actual frequency coverage will depend on the external antenna unit connected to the meter’s SMA connector, the included whip antenna covers around 700MHz to 6GHz which is enough for most of the applications for Electrical field strength measurement, for other frequency coverage we have LPDA1810 log antenna (1.8GHz to 10GHz) and BAT8 broadband antenna(400MHz to 6GHz) as an optional item, you can connect any antenna on the market to the ED85EXS too, and the frequency coverage will depend on the antenna you use. just search the web with “EMI antenna” you will find a lot of it, for low frequency band such as 1MHz to 100MHz the external antenna units will be large, if you just want to use the meter as an RF detector a long wire or telescopic antenna with SMA connector adapter for ham radio/CB radio will do a job (you can find it from Radioshack).”

  • Tiffany said,


    Since getting the meter, I occasionally walk through the house with it to confirm readings. On occasion at night, places in my home that are normally below .02V/m during the day, are higher at night- .06-.07V/m. Do you have nay idea why that might be? There is a cell tower about 500m from our house, does the signal strength on towers change depending on the time of day?

  • Lloyd said,

    Hi Tiffany
    Signal strength varies on cell towers…when more people are on the network the RF levels rise. Also atmospherics play a role, when it rains (water conducts electricity), towers power up to compensate.

  • Lloyd said,

    My concern is the health effects of EMFs, I’ve never attempted to build an EMF meter. Sorry I can’t be of more help.

  • siddharth jere said,

    hey i m an electronics and telecommunication engineering student and want to do a project of making radiation detection meter for my final year…..can i have any kind of help if possible from ur side?

  • Vince said,

    Thanks for your research Lloyd! Since this is not a tri-field meter, what is the best way to use it to measure from all directions? Thanks again!


  • Lloyd said,

    Hi Vince
    Turn your meter round slowly in all directions (x, y, z axis).

  • Inga said,

    We are considering building a house near several antenna masts. There are cell phone antennas but also radio and tv broadcast antennas. Would the cornet measure the radiation of all these antennas or just cell phone? Thanks in advance for your help!

  • Lloyd said,

    It depends what frequency the radio and TV broadcasts are sent out at….which you can probably research via the internet. But the ED85EX should pick up signals from all these sources….it has the broadest frequency range of any of the meters I have tested (1MHz to 8GHz – useful to 10GHz according to manufacturer).

  • Inga said,

    Thanks a lot for your reply Lloyd. Much appreciated.

  • M. Woodward said,

    I just received my Cornet ED85EXS and tried it on my new microwave combination convection oven. It said +5dbm is that bad? What is the number recommended by the FDA to be safe in dbm numbers?

  • Lloyd Burrell said,

    The DBm setting is not suited to measuring the health effects of RF radiation you need to change your display setting to W/m2 or better still to V/m…do this by pressing the top button (my video on this page shows how to do this). FCC safety levels are outdated….a better reference is the BioInitiative report guidelines, see

  • M. Woodward said,

    Hi Lloyd thank you for the quick responses to your messages. I seem to be challenged when it comes to numbers and need basic information on ho to read these numbers. I am 65 and need basic charts or a cheat sheet to decipher the numbers I will be using two different instruments.
    The Cornet ED85EXS & the Trifield 100XE EMF Meter. I need a chart with the scale from good to bad for each meter and for each separate test such as dBm, mW/m2, VM for the Cornet and the Trifield 100XE EMF Meter for the tests with this meter also. All the numbers are a mystery to me. I really need to do a proper test on my new Microwave I bought four months ASAP because it may be going back to the store. It is a 1000 watt over the range MAYTAG Combination Convection oven I need to be spot on with the numbers for a good reason to return it. I need to do a close up to distance test any help you can give me to accomplish this will help me would greatly be appreciated. I will be checking my whole house I also suspect my wiring is not right because it is a older home I will be checking that also. You may email me with the information I need.
    Thank You ,Mary

  • Lloyd Burrell said,

    With the Cornet meter you don’t have to concern yourself with the numbers just look at the LEDs, red indicates dangerous levels and green indicates safer levels (as I said before use only on W/m2 or V/m) . And if you’ve already got the Cornet you will only be using your Trifield on the magnetic and electric field settings, again the display itself indicates what the danger levels are. I’ve done videos on both these meters which show the meters in action with simple explanations on how to use them, just take your time and keep reading up on this – it can be a very daunting subject at any age.


    please, how can i use the cornet ED85EX to measure cell phone radiation accurately?That is what are the procedures/steps to follow in measuring cell phone radiation?
    Thank you.

  • Lloyd Burrell said,

    The ED85EX measures the ambient RF radiation in your environment….if there’s a cell phone in proximity it will measure the emissions from the cell phone.
    If you want to measure only cell phone radiation you’d need to be in an environment where there was only cell phone radiation since the meter tells you what the overall RF levels are in the environment.
    I recommend using it on the V/m setting or mW/m2 – see my video above to configure this.

  • Sandeep said,

    Dear Sir,

    I have 4 No’s Cell phone towers within 50-200m radius of my home. I want to check RF radiation in my house.
    I am from INDIA.Should I go with Trifield 100XE or Cornet ED78S RF/LF.Are these instruments accurate enough to give proper & reliable readings of RF radiations?



  • Lloyd Burrell said,

    Hi Sandeep
    The Trifield is not suitable for measuring cell tower radiation – I recommend either the Cornet ED78S or the Acousticom 2.

  • José Luis said,


    I could be wrong, but I have realized that the information in this review as well as the one in could be mistaken.
    ED85EXS sensitivity is from –65dBm to 5dBm and not from –55dBm to 0 dBm according to


  • Lloyd Burrell said,

    Hi José
    I’m guessing this is explained by the fact that the sensitivity is improved if the meter is used with an external antenna via the SMA connector….

  • Anthony said,

    Hi Lloyd,

    Your site is a great source of unbiased information. As a sufferer, it’s obvious you’re just trying to do the right thing and inform people.

    Have you ever looked at (labeled 18GHz RF Meter)? More info is at what looks to be the manufacturer or distributor website. The digitals offer lots of information, but sometimes the simple stuff works best.

    If the analog is a no-go, then I guess I’ll go for the ED85EX, as I already have the TriField. Didn’t know it wasn’t any good at all for the cell and wifi signals until I studies your website.

    As to measuring stuff in the car, I read on your site that a DC meter is required. Would something like this work – ?


  • Lloyd Burrell said,

    EMF meters for health is mainly about measuring small changes in low levels of EMFs and having a display which can communicate the minute variations….the display on the RF meter looks to be something of a blunt instrument. To measure in a car properly you do need a DC meter….in fairness I haven’t tested either of these meters so I can’t comment on their performance.

  • dorsha said,

    Hello Lloyd and thank you for so much of your time.
    In addition to the health effects of EMF, I’m also wondering if the Cornet ED85EX will also alert and record SMS burst signals as in the case of trackers.
    Thanks again.

  • Lloyd Burrell said,

    SMS signals tend to be quite weak…if you hold your Cornet close to the cell phone/device it will probably give you a reading.

  • Dave said,

    I’m comparing the ED78S and the ED85EXS. I like the ED78S better because it also measures Magnetic radiation (and is cheaper), but the one main advantage the ED85EXS has is that it measures down to 1 MHz, which includes all the FM transmissions. I’m not currently ES, but my property is about 130 meters from a tall FM tower (97.7 is the frequency of the radio station) that is next to a radio station that broadcasts their signal far. As far as health is concerned, are FM frequencies typically a problem for ES people? I’m just wondering what is the value of being able to detect the extra frequency bands (from 1 MHz to 99.9) of the ED85EXS?

    Also, isn’t is possible to just use a multimeter to test for electric fields (by attaching to my body)? If so, the ED78S + a multimeter will help cover the 3 EMF fields. But would I also need a plug in device to test for dirty electricity?

  • Jim said,

    Hi Lloyd,

    I just looked at the Bioinitiative Report 2012 Research Summaries and their results charts measure RF in centimeters squared, but the Coronet ED85EX uses meters squared. Can you tell me the math on this difference? Does the ED85EX measure this seemingly ultra sensitive level?

  • Dave said,


    You can convert from W/m2 to W/cm2 here:

    the math is explained at the bottom

  • Rosemarie said,

    Dear Lloyd, I purchased the Coronet 85 a few months ago and have compared the reading to my old electosmog meter (to 3.5ghz). I am very pleased with the Coronet. The Cornet is more sensitive and now I can read routers, wifi, cordless phones that my neighbors are using. I mapped the entire development over the last three years to verify the effects of a cell tower. The tower still is not on but was recently hooked up to fiber optic cable so I think it will soon be powered up. Any info you have regarding what the fiber optic does would be useful. I have done everything I can for my home (shielding,replacing and removing all wireless, unplugging appliances,filters)and my health (diet, supplements, heavy metal detox, homeopathy) and I am improving nicely! I have picked up many useful suggestions from your site. Thank you!

  • Lloyd Burrell said,

    Fiber optic cables are sometimes used for cell tower installations instead of wire or wireless transmitter/receivers. Fiber optics use light instead of electricity to transmit data and are widely viewed as being a safe technology for consumers and nearby populations.
    I’m so glad to hear that your symptoms are improving Rosemarie.

  • dave said,

    Are you sure the only difference with the S model is the sound function?

    As someone pointed out it does say for the S
    –65dBm to 5dBm (8.2mV/m to 26.2V/m)
    I cannot find the same specs for the ED85EX.
    All Cornet say, is that the very low field measurements are uncalibrated.
    So according to Cornet, the S model will beat even the Acoustimeter 2 for sensitivity.

  • Lloyd Burrell said,

    The ED85EX and ED85EXS have the same sensitivity. The official spec. is -55dBm (0.0018341mw/m2) but they are both calibrated down to -65dBm with SMA direct. The spec. I list in my review is using the aerial supplied – because this is how most people would use it.
    In a ‘side by side’ test the Acousticom 2 shows greater sensitivity to low level RFR than the ED85EX.

  • sally gray said,

    Thank you so much for your e-mails and the information you are providing to those in need of your invaluable help.

    I have ordered a Trifield 100XE meter from Amazon to test household appliances. I have also been looking at ordering another meter. My daughter lives next door to a family with a smart meter. Although I have uploaded leaflets from Stop Smart Meters UK and popped them through their letterbox, the Smart Meter remains.
    Also, nearby is an electricity sub station, which I would like to test.
    I would be very grateful if you could advise me what Cornet you would recommend to test the radiation coming from the smart meter and also the sub station. It might also be a good idea to test for mobile phone towers.
    Many thanks.

  • Lloyd Burrell said,

    The biggest issue with substations is usually magnetic fields but these fall off very quickly with distance….your Trifield will confirm this. To measure EMFs from the smart meter (RF radiation) if your budget will stretch to it the Acoustimeter then in order of preference, Cornet ED85EX , Acousticom 2.

  • YYY91006 said,

    Hi Lloyd,

    I have this Cornet ED85EX meter, do the measurements go higher than 1827 mW/M2 and 26.22 V/M?

  • Lloyd Burrell said,

    I can’t say if the RF measurements go that high because I’ve never been around RF levels that high….thankfully.

  • Debbie said,

    I have read that a directional antenna can be added to the ED 85EXS. Can you elaborate on how that can help. And where I can get one, how to know which one to get? Also, I saw that this meter can go up to maybe 10GHz with additional antenna piece. Where can I get that?
    I moved into a house that I belatedly found out was 1/3 mile from 3 cell phone towers including, a massive one, and has a smartmeter. The move was at great expense – we lost our house of 24 years to the bank. It had no smartmeter and I had no idea about these problems. I am suffering greatly now and don’t feel I can sleep here. My husband wants to try to mitigate it somehow (he is not EHS – I have become so since moving here). So to get some objective understanding of what can shield us we need a good meter.
    Also, I read that cell phone radiation can now go above 8 GHz. Is that so, or common? If so, what meter can go that high?
    Thank you. I have read the other posts and you caring give detailed understanding and information and I appreciate that.

  • Lloyd Burrell said,

    There are several antennas that my be fitted to the ED85EX. These antennas improve the performance of the meter in different frequency ranges as follows:
    1. Log-Periodic Antenna LPDA1810 for the range of 1.8GHz-10GHz
    2. Broadband Antenna BAT8 for the range 400MHz-6GHz
    3. Telescopic Antenna TELE5 (adjustable length) usually for the lowest frequencies starting a 1MHz.
    4. NEW Magnetic near field probe MP1 (for RF magnetic field).
    I’ve only ever used my Cornet meter with the standard antenna – for more information on these different antennas contact Radmeters
    Currently I know of no cell phone networks that are operating above 8 Ghz, some WiFi operates in the 5-6 Ghz range and military installations can go higher than this. My Free Report has more tips on shielding.

  • YYY91006 said,

    Unfortunately, that’s the level of my iPhone’s RF radiation that I have to deal with everyday.

  • Debbie said,

    Hmm…. lessemf told me I could only measure effective shielding for a cell phone with the near field probe. Have you been able to do it with just this Cornet itself? Perhaps I misunderstood them.

  • Lloyd Burrell said,

    The ED85EX comes equipped with an all purpose whip antenna but more accurate readings can be obtained with a variety of different antennas in different circumstances/for different frequencies. If you’re trying to measure radiation from a cell phone you may be able to get some readings with the regular antenna (depends on the cell phone, depends on the circumstances, how hard the cell phone is having to work) but the near field probe antenna will provide you with more reliable readings.

  • Rosemarie said,

    Thank you for the clarification on the optional antennae. I definitely want to get the near field probe antennae. I have been working with an Electrical Engineer who ran much of the power throughout California. He was very impressed with the ED85EXs. He taught me many things about electrical problems he has encountered and it never ceases to amaze me how complicated the issue is. From the meter graph he could identify that my neighbor had a pump that had just turned on. The pumps are not code (legal) to use for water pressure. At least 12 have been in use surrounding my home. Please let folks know that pumps can be a source of EMF on their home wiring!

  • Lloyd Burrell said,

    Quite right Rosemarie…its not until you’ve got a meter as sensitive as this one that you realize all the things that contribute to the electrosmog in our lives.

  • María said,

    hello Lloyd,
    After a lot of reading in your web an in others, I am trying to decide between buying the ED85EX or the ED78S.

    My health problems principally have to do with microwave radiation. After having wifi in my computer + cordless phone, and mobile phone at home for a whole year, and two extra years living a hundred meters away from two antennas, I have become electrosensitive. Of course, as many of us I was completely unaware of the danger. However, recently I am also noticing the effect of tv, pc, and lightbulbs, but this is only when I go to the city and overexpose myself. It lasts 4 or 5 days and

    I read the posts again and again but I cannot decide myself. Which one would you recommend me? Do you think the ED78S gives a significant help compared to ED85EX despite the loss of range in the scale? Both would be good?

    Thank you and congratulations for such a great page.

  • Lloyd Burrell said,

    It doesn’t make sense to buy both these meters Maria because they’re both essentially RF meters. If your budget is tight buy the ED78S which is dual function (RF radiation and magnetic field measurement) but if your budget can stretch to it buy the ED85EX (if you can afford the LPDA1810 antenna better still) and buy the ME3030B to measure electric and magnetic fields.

  • Fee said,


    I have used my new cornet 78s to measure the RF where my children were sleeping emanating from our neighbour’s WIFi or DECT. You mentioned the bio initiative recommends a limit of 0.19 volts/meter for indoor exposure – then further down you mention update there’s a new 2012 bio initiative report. I can’t work out their new recommendations- do they change from 0.19v/m? (After 5 mins of recording the RFthe highest v/m was 0.2066- I’m hoping that isn’t too bad?

    Many thanks


  • Lloyd Burrell said,

    For my article on the BioInitiative Report see

  • Fee said,

    I am finding your website incredibly informative. You mention that some lower frequencies can actually do more biological damage (I had formerly thought that higher frequencies, with shorter wavelengths were more damaging). A cell phone tower near me is about to be made higher and add more Antannae and a 4G frequency and whilst at present my cornet gives as acceptable V/M level I am concerned that these additions will be far more damaging. You also mention pulsation being damaging is 4G more pulsating as there is such a variety of data that it will carry? Many thanks Fee

  • Lloyd Burrell said,

    4G (LTE) can be equated to 3G plus pulsing….the studies done so far on this technology ( merely confirm its dangerous but not whether its any more or less dangerous than the previous cell phone technology….this makes a broad approach to EMF protection ever more relevant.

  • Lyn said,

    THANK GOD FOR YOUR WEBSITE!!! I would be totally lost in trying to figure out which meter(s) to buy if it weren’t for your excellent and informative reviews. I am copying them into Word documents so that I can study these offline since I can no longer handle being here in front of my AT&T U-verse 2 Wire modem-even after I disconnected the wireless and my cordless phone. I can’t study anything once my brain disappears. BTW I didn’t have this problem and the many other health issues that developed after the Smart Meter was installed, which apparently pushed me right over the “EMF Cliff”.

  • Dave said,

    I found this website that is a PDF of the 85EX and it tells at what levels the lights are programmed for, like the green areas mean “safe” and the yellow caution and the red dangerous. The issue I have, unless you correct me, is that the Bioinitiative report for 2012 recommends you maintain a level below 3 to 6wW/m2 (same as .003mW/m2) and yet this meter’s lowest most conservative level that is green (supposedly safe) is .06mW/m2, which is 20 times stronger than the BIO12 recommended level of .003mW/m2. Am I converting wrong? If not, why the huge discrepancy between Cornet’s recommended safe zone and the BIO12?

  • Lloyd Burrell said,

    When your RF readings on the ED85EX go from the red lights to the green lights this indicates ‘safer…..nobody can say with absolute certainty what constitutes ‘safe’ for man-made EMF exposures.

  • Eddy said,

    Hello Lloyd,

    I am planning to buy RF meter that scan up to 8 GHZ.
    which brand and model do you suggest in terms of sensitivity, performance from the below:
    – ED85EX
    – TES593
    – Acoustimeter RF-10


  • Lloyd Burrell said,

    I’ve reviewed both the ED85EX and the Acoustimeter (I can’t comment on the other meter I’ve never used it)….they are both very good meters…..but quite different…..the Cornet gives much more data and allows you to use different antennas depending on the circumstances….the Acoustimeter gives less data but is more sensitive….I suggest you read my reviews thoroughly before buying.

  • Greg said,

    Hi Lloyd,

    we live in a flat were, 2 floors below there is
    a Taxi-service HQ, with their main Antenna fitted

    I want to ask you which radio-frequencies are used
    for such Taxi-service antennas, and which “affordable”
    EMF Meter would be best for relatively reliably measuring the RF-levels we are exposed to ?

    Also: what is the maximum tolerable RF-levels that
    are considered safe (thresholds) ?

    Thanks heaps !


  • Lloyd Burrell said,

    The frequencies used by taxi radio frequencies vary from town to town and country to country…. you need an RF meter that measures in the low MHz frequencies….which is the most likely frequency range that is used…..the Cornet ED85EX is the only reasonably priced meter I know that is capable of giving you measurements in this range….for my review see As to ‘maximum tolerable’ there is no simple answer to this question….I suggest you download my free report and newsletters to gain a better understanding.

  • Mike said,

    Hello again Lloyd,

    Just wanted to say that my ED85EXS meter is still going strong after 2 years of owning it. I recently got a log periodic antenna. This “really small” antenna can detect 2 cell towers that are .22 miles away.

    I can determine the different sources by their “sound signature(s)”. And the meter is calibrated to the antenna properly.

    When I hook up a telescoping antenna, the meter becomes a portable FM radio (loud & clear). People forget they’re getting bombarded by radio waves as well.

    I love this meter. I’ve got different antennas, filters and attenuators for it.

    P.S. I noticed Cornet came out w/ a new meter. Still, nothing beats the ED85EX “S”.

    Keep up the good work,
    Mike from So Cal

  • sergio said,

    Please rectify “it depends what scientists you listen to”.

    It makes it look like the health effect would change whether you listen to one or another scientist.

    Scientific results of effects in cells and whole animals APPLY to you, you like it or not, you believe it or not, you experiment sympthoms or not.

    Now, if you are going to distrust every study, keep in mind those who decided to honestly publish the worst results, didn’t invest millions in purposedly hurt the animals, nor make millions in sales for safety devices (maybe a few thousands) but those who invested in “make current standards look like safe” make billions in profit, if not trillions. And that’s the best way for people to decide who to start believing to, before having the time to care enough to read a little.


  • Tom said,

    Hi, I would like to buy an RF meter that measures up to 8GHz, apparently the newer version of the Cornet ED-85EXS has sound/audio functionality to identify RF sources, is it’s audio/sound function as good as the audio/sound function of the Acousticom 2?


  • Lloyd Burrell said,

    Hi Tom
    It’s difficult to compare the sound functions of these two meters but what I can say is that the Acousticom 2 and Cornet ED85EX are quite different tools. The ED85EX gives much more data with it’s LCD display and histogram, and is more evolutive (in terms of the different antennas that can be used to improve it’s performance). The Acousticom 2 whilst being just as sensitive (if not more) is more a ‘point and go’ meter.

  • Sam Lewis said,

    Hi Lloyd,
    I’m considering purchasing the Cornet ED85EXS and I have a couple of questions. Do you know if it can display both peak and average measurements? Is it sensitive enough to measure background levels of cellphone radiation?
    Thank you,

  • Lloyd Burrell said,

    Hi Sam
    According to the manufacturer the readings on the mW/m2 and uW/m2 setting are peak readings….peak readings are the most relevant for health. These reading are calculated by taking 3500 samples every 0.5 seconds and displaying the maximum one that was detected on the display…this meter is perfectly suitable for measuring cell phone radiation.

  • Rosemarie said,

    You may be able to buy an extra antenna for the meter that is just for near field measurements like your cell phone. The antennae is loop shaped. There is an antennae that measure in three different axis and the one the meter comes with which will probably be adequate for most needs such as cell phone and measurements of levels in an area but not by direction.

  • Thomas said,

    Hi Lloyd,

    Thanks for your very precise description of the ED85EXS Cornet that I’ve just bought. As it is not calibrated I would like to know if there’s a correction factor that I have to apply on the result ? I don’t find on the web other informations besides the fact that the value given by the Cornet may be overestimated.

  • Mike said,


    You don’t need an additional antenna to measure cell phones. The stock antenna (which is centered at 800 MHz) will do just fine.

  • Mike said,


    The stock antenna doesn’t need to be calibrated. Only when you use a different antenna and/or attenuator(s), then the meter should be calibrated.

    You would then use the stock antenna (and EMF source) for reference.

    Always good to read the manual. Contact customer support. I have many times and they always responded with the info I need.

  • phil said,

    There is a cell tower within 40m of the school. The cell tower antenna is at the same level as the 2nd floor classroom and I am concerned about radiation levels affecting the children. Is this meter any good for measuring radiation from a cell tower.(or would I be better using a different model or even something like a Trifield 100XE). I cant really afford more than £100. Thanks

  • Lloyd Burrell said,

    Hi Phil
    This Cornet ED85EX is ideal for measuring cell tower radiation – the Trifield 100XE is not a good choice for this. Beware about choosing an EMF meter merely on the criteria of price….there are a whole load of meters on the market under the $100 mark which are so insensitive that they’re a waste of money. If your budget is tight the Cornet ED78S is also a good choice, see

  • Lloyd Burrell said,

    Whoops – I meant to say

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