EMF Meter,Advanced GQ EMF-390 Multi-Field Electromagnetic Radiation 3-in-1 EMF ELF RF meter, 5G Cell Tower Smart meter Wifi Signal Detector RF up to 10GHz with Data Logger and 2.5Ghz Spectrum Analyzer

Amazing device and came fully updated.While reading the manual I got a text, this thing detected it, threw a beeping alarm and told me what it was.I was like wth lol and it was 2 feet from the phone at least.So far it tracked down the RF I was getting in my dj equipment.Turned out to be an old school ceiling fan lmao.Also found a wiring issue with the ac lines we didn't know we had.Great device and easy to use. Cash well spent.

I was looking around for a reliable and reasonably priced emf meter and came across this one made in the US. My experience with many China made test equipment is that they do not last long or are not accurate and reliable (you get what you pay for).The beauty of this product is that it can give the readings of the EMF, EF and RF on the same screen with an audible alert if they reach dangerous levels. It can also be switched to dedicated screens to give more details for each type of field. It is nice and compact, the screen is bright and the display readings are clear.I have used this product for over a month now with no issues. I have learnt a couple of things like not to stand less than 2 meters from an operating microwave oven as it will slowly cook you from the inside with dangerous levels of radiation. The wifi router is another thing to look at as it does radiate quite significantly over certain distances. Best to put the wifi router off at night when not in use. Even gang plugs, with the wire rolled into a loop can radiate quite significantly at close range. Also, try not to sleep with the cordless phone or mobile phone too close to your bed.Interesting discoveries made from just purchasing the right tool. I would recommend this product to anyone looking for a good, reliable and reasonably priced product.

Easy to run and long battery life.I did not realize how much RF, and EF, we are exposed to.Its a nice little device to see how to avoid long term exposure, and what to avoid.My cell phone is not sitting next to my body anymore for any long term time, I could not believe how high the RF is when connected to WIFI or the tower..

I just got my GQ EMF-390 meter and have spent a number of hours playing with it and testing it. I like it, and it's a good meter, but you gotta learn to sweet talk to it. In other words, you have to invest some time in learning how to use it properly.I am in training with the Building Biology Institute to become an Electromagnetic Radiation Specialist. I'm speaking for me, not for them though. But, I mention it because I've spent a lot of time studying EMF meters and EMF measurements lately. That point of view affects how I view these instruments.Consider this an introduction to a review, as I just realized I'm running out of time and have to continue later. So, for the moment, I'll just post some high points.01) This is a consumer grade instrument, which they say in the FAQ, not professional grade. So, balance your expectations accordingly. However, that doesn't mean it can't be useful to a professional, as well as consumers.02) The quick start guide is just that. Do read it. But realize that's only the beginning of your journey. Download the full user guide, which is a PDF of many pages, and go through that. At least their documents are written in mostly good English, as opposed to Chinese-English. As a bonus, the quick start guide is in color.03) Learn how to operate the controls. This may not be obvious at first. Once you're used to them, it will seem much more natural. While the buttons don't have printed labels on them, they do have shapes molded into the plastic, which you can see if you look.Some buttons do different things depending on whether you press and release, or press and hold.If you have the meter facing you, in landscape (wide) mode, and the buttons and model number are on the right:The TOP button, which they call S4, can: check the battery when powered off, power the unit on and off, activate the menu system when powered on, select items in the menu system, and sometimes change things in the menu system.The BOTTOM button, which they call S1, can: back you out of most menus, activate a menu to select the different screens of the device.So, an effective technique to go through menu settings is: press the TOP S4 button to get into the menu, press one of the middle buttons to navigate, press the TOP S4 to select an option, press the middle buttons to change an option, press the TOP S4 button to finalize your answer. Sometimes, pressing S4 will change an answer, so make sure the screen says what you want when you're done. You can then get out of the menu system with the BOTTOM S1 button. You can, if you wish, go back into the menu, and examine each setting without changing it to verify the settings.When not in a menu, the middle S2 and S3 buttons do various things, like allowing you to alter units, switching from EMF (magnetic and electric field) mode, to RF (radio field mode), moving a cursor, zooming in or out, etc. You kind of have to play with these buttons on each screen. Sometimes they do something different if you hold them down.04) IMPORTANT, learn how to point the meter. Inexpensive meters have sensors which are directional, and they care about how they're oriented in space. This meter has a 3 axis magnetic field sensor, which they label on the screen as EMF. So, you can turn the meter any way you want to read magnetic fields. BUT, the electric field sensor (EF), and the radio field sensor (RF) are directional. If you're pointing the meter the wrong way, you may get wrong readings, or no readings.This is documented on page 5 of the quick start guide, as well as in the PDF. Nevertheless, it bit me and caused me to lose some sleep last night fretting with it. I haven't done much with the EF sensor, but I've been working with RF. This meter may NOT work like you expect, but it will work if you treat it right. My Safe and Sound Pro II meter and my Cornet ED88TPlus will both respond to most RF signals if you are holding the meter in front of you in portrait mode (vertically), with the display facing you, and the RF source, like a cell tower, out in front of you. This meter will NOT respond that way. With this meter, you would be pointing it's sensor up into the sky.Imagine this meter is a small airplane. Place the meter flat on a table with the buttons and label near you and the display face up. The near end with the buttons is the tail. The far end where the propeller of a plane would be (its nose) is the front. The far end, as in edge, of the meter is where the RF sensor is pointing. If there were a cell tower, for example, out in front of your table, you could get a reading on it. In terms of an airplane, pitch means to bring the nose up or down. Yaw means to slide the tail left or right, turning without changing the bank of the wings. And roll means to bank or tilt the wings left or right. Rolling left or right is (sort of) what a race car does going around a sharp turn on a banked track.For lack of better terms to use, this meter CARES about pitch, roll, and yaw. If you pitch the nose of the meter up or down substantially off the line to the source, you will get bad or no readings. If you yaw the meter left or right substantially off the line to the source, you will get bad or no readings. But, that's not all. The meter cares about roll too.All radio waves move outward from the source. But they also have orientation in space. They may be oriented vertically as they move outward. This is called vertical polarization. This usually requires a vertically oriented antenna to receive well. They may be oriented horizontally as they move outward. This is less common and is called horizontal polarization. This usually requires a horizontally oriented antenna to receive well. There are even some sources which are circularly polarized.If you have a cordless phone, you could test your meter with it. At least in the US, almost all cordless phone base stations radiate a strong signal all the time. One you should not stay around. Remember that verbiage on the box that says it will work 900 m away? But you don't sit 900 m away do you? I have decommissioned all my cordless phones. But, they make a great little personal microwave beacon for testing. Just plug in the cordless phone base station to a power source, set it several feet away, and start taking readings. It should put out a continuous signal. On meters with a histogram mode or moving graph mode, like the GQ EMF-390 or the Cornet ED88TPlus, you should see a continuous signal or a continuous string of pulses. You can also test the meter pointing it at a cell tower, etc.So, what this all this means is, assume you have pointed the meter up and down (pitch) to line up with the source, and you have pointed the meter left to right (yaw) to line up with the source, and it's lying flat on the table (or in your hand) with the display up (roll), you STILL may not get a good reading. This was my experience testing with the cordless phone base station. I had to roll the meter 90 degrees, so the display was facing to my left. THEN, I got a strong and consistent reading.You may have to do similar gymnastics with the Cornet ED88TPlus and other meters. This is true with any meter with single axis sensors. This may make the display hard to read because it's facing away from you. The difference between this meter and the Safe and Sound Pro II and the Cornet ED88TPlus is that those measure RF with the display facing you as you might expect, and this one doesn't.That's it for now. I hope to add more later. This should get you started. Forgive any typos as I was in a hurry.Bottom line, this seems to be a good meter if you understand its limitations and treat it properly. If you treat it wrongly, it will give you bad readings in return.Hope it helps.Ron

Didn't know what to expect but this really works I like the fact that it gives me all the readings in one spot

Works as it should. Not difficult to use as many people say. I found it very easy!

When you do a search, a lot of people like the tried-and-true analog one, and it looks like a quality unit. But this thing does so much more! It’s a great EMF reader. When tested against the Tray field, it says accurate and has a much greater range. But When you see the features that this thing has just on the RF meter it will blow you away. You can pinpoint different frequencies and different strengths of different frequencies. You can make a graph out of it spanning any length of time. You can hold at the High Point’s. Once you start playing with it, you realize this is way more sophisticated than any of the other ones with a few lights are at Gage. So far, I’m very happy with this item, and I have had three other similar items before it. That were just Soso. I can’t believe any of the other ones are even suggested anymore with this one out.