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Availability:
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Arrives
Tuesday, Oct 27
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Features
- Detects: Magnetic fields, electric fields, and RF (20 MHz6 GHz; includes most 5G but not experimental millimeter waves). Does not detect radioactivity.
- Displays EMF fluctuations fully: bars update instantly for fast digital signals, while RF and number averages refresh 4 times per second. Other meters over-average or filter field peaks, giving slower, less complete readings.
- Features: 3-axis magnetic, single-axis electric (with standard or weighted frequency responses), and single-axis RF readings (unweighted). Weighted readings emphasize effects on the human body.
- Measures: 4G and 5G cell phones, cell towers, WiFi routers, Bluetooth, AC Powerlines, and Smart Meters. The TF2 responds to RF very fast compared to other meters.
- Includes: Trifield TF2 meter, 9V battery, Quick-start Card, Detailed Instruction Manual, and soft-shell, zipper carry case.
- Manufactured and Serviced in USA by AlphaLab, Inc. with a 1-Year Manufacturer Limited Warranty. Free, unlimited consulting to help solve your EMF issues included.
Description
Founded in 1993 by Dr. William Lee in Salt Lake City, UT, AlphaLab Inc. designs, manufactures, and supports instruments for measuring EMF, EMI, static electricity, and air ions, including the popular TriField Meter Model TF2. All AlphaLab meters are built, tested, calibrated, and serviced right here in the United States. Bottom line, we build great metrology products that seldom need to be returned and are rated very highly by our customers for a good price. For over 32 years, AlphaLab has produced innovative meters used in HVAC, medical, aerospace, research, education, shipping, clean rooms, government research, and mass production electronics. Our best-selling meter, The TriField Meter Model TF2, is not only CE certified, but also carries FCC and ROHS3 certifications as well. AlphaLab meters focus on performance and value. Instead of flashy packaging and social media campaigns, we invest in quality components, design, and testing to ensure long-lasting reliability, durability, and most importantly, accuracy. What Can I measure with the TriField TF2? The TF2 measures EMF from WiFi, Bluetooth, most cellular signals, motors, wiring, and common appliances like microwaves or induction cooktops. It does not measure signals below 20 MHz, radioactivity, or millimeter-wave 5G/6G frequencies above 6 GHz. Why does my TF2 measurement seem to 'jump' or 'bounce'? EMF fields—especially RF (radio frequencies)—are constantly changing, so readings aren’t fixed. The TriField meter displays these real-time fluctuations instead of smoothing the data. Check the peak value in the upper left to see the fast RF signals. When comparing the TriField TF2 meter to another meter (or professional service), the readings don't match. Why? Great question. Meter readings can differ for two main reasons: sensor placement and frequency range. Even small position changes can affect readings. Meters with different frequency coverage may detect different signals, especially in RF mode. While measuring my phone or router, I don’t see any signal — why? This is normal. Phones and routers spend most of their time in low-power standby mode and transmit only when sending or receiving data. To see higher RF levels, stream a video, make a call, or download a large file while measuring. Can the TF2 be used to measure signals from infrastructure like cell towers? Yes, the TF2 can measure cell tower emissions. Keep in mind that not all towers are cellular, tower signals are directional, and activity varies. For stronger readings, measure some distance away and stream data or make a call while testing.
Brand: TriField
Item dimensions L x W x H: 1.5 x 2.75 x 5.25 inches
Item Weight: 11 ounces
Maximum Supply Voltage: 9 volts_of_direct_current
Output Type: Digital
Maximum Supply Voltage: 9 volts_of_direct_current
Output Type: Digital
Specific Uses For Product: Detect and Measure EMF Field Emissions
Item Dimensions: 1.5 x 2.75 x 5.25 inches
Item Weight: 11 ounces
Brand Name: TriField
Model: TF2
UPC: 646437359443 602401544215 602401544826
Number of Items: 1
Number of Packs: 1
Manufacturer: AlphaLab, Inc.
Item Highlight: Made in USA by AlphaLab, Inc. • Unlimited U.S.-based support for all your EMF questions and concerns
Warranty Description: One Year Limited Warranty from the date of purchase under normal use and service. Contact AlphaLab, Inc. for details.
Unit Count: 1 Count
Included Components: Quick Start Info Card, Manual, 9V Battery, Soft-Shell Zipper Carry Case
Part Number: TF2
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Oct 27
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
I've owned the prior versions of the tri-field and this latest model is an excellent upgrade. I didn't think I'd like the digital but after using it I really like it a lot. it has more functionality than the analog versions. I starting using tri-field meters to become more aware of the electromagnetic fields around me and what normal appliances throw off. Once you start using this meter to monitor your environment you can start to understand how you can address them. I for one was shocked how much is thrown off by a simple microwave and how far that effect is. now when I microwave food I step out of the room. I highly recommend this product.
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Reviewed in the United States on September 20, 2026 by Frank in NH
As an EE and having worked in a building where faulty electrical wiring resulted in wildly wobbly CRT displays, I've always had an interest in perceiving or detecting these everyday but invisible fields. The Trifield 100XE has been on my Wishlist for quite some time, but never quite reached the threshold of an order. Recently I noticed this new model TF2, and the superior specifications and display readability compelled an order. The meter arrived with battery already installed. The new case design is smart, modern and high quality. With the backlight on, the display is remarkably clear and informative. The analog display (the bars) uses a logarithmic scale to convey maximum information at a glance. The digital read-out updates several times a second, frequently enough to track a changing value but still allowing the value to be read. The peak value digital read-out significantly boosts the meter usefulness by capturing short signals that otherwise would not be reflected in the analog or digital read-out. The hold time of the peak read-out is just right. While initially checking out the meter around the house, I was amazed that holding the meter in front of a loudspeaker produced a field strength display synchronous with the music playing (should not have been amazing, of course). The TF2's extended RF frequency range allowed me to check my 5 GHz WiFi access points and note the intermittent pattern of actual transmissions. While checking my microwave, I did notice a scale gap since the leakage safety limit at two inches is 5 mw/cm^2 vs. the meter's scale limit of 1000 mw/m^2. The centimeters vs. meters difference results in factor of 10,000, so the safety limit converted to the meter's scale units is 50,000 mw/m^2, far in excess of the meter's measuring range. So it's necessary to take readings at a greater distance. Using a wooden yardstick to position the meter 36 inches away from the microwave reduces the field strength to approximately 1/320 of the value at two inches. When I performed this measurement I found that my 10-year old microwave significantly exceeds the current safety limit, so I'll need to follow up on that. *** Follow up - March 11, 2018 *** It occured to me that a microwave oven is not a point source of radiation hence the inverse square law is not accurate at room-sized distances. Then I located a paper on the NIH website entitled "Exposure assessment of microwave ovens and impact on total exposure in WLANs" which includes an adhoc formula mapping the field strength vs. distance. The so-called "path loss exponent" is a parameter in this formula. It would be 2 for the perfect inverse square law. However, for distances less than one metre, and with 275ml water in the microwave oven, the adhoc value (as listed in the paper) is only 1.20. This change in exponent means that the RF value measured at 36 inches away from the microwave reduces the field strength to just 1/32 of the value at two inches. With this change of calculation my 10-year old microwave oven is just fine for RF leakage.
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Reviewed in the United States on February 13, 2018 by CFortC
I bought this Trifield meter because it came highly recommended by several social media sources. I've wanted one for a few years and just made the decision to buy it. All, I can say is, "Wow! What an eye opener!". It's like having a new set of eyes, seeing things you couldn't see before! I measured around my work table. There was a lot of RFs coming out of laptop but you had to get really close to the screen or keyboard. At normal viewing distance, the levels were "safe" (0.20 mW/m**2) according to their documentation. Of course, you need your hands to be close to the keyboard to type but that can't be avoided. My router surprisingly had very low RFs coming out of it but I had always adjusted the router to put out 25% output power in it's settings. No need to blast my wifi to my neighbors. What really surprised me, was my table lamp was putting out massive RFs! It was well above the normal safe levels if you're close to it. I normally have it about 2 feet away from me which brings the RF level down to safe. But sometimes, I bring the lamp close my head when trying to read small writing. What's also very surprising is the amount of "unsafe" RFs coming into my bedroom window! I did similar readings from other windows and they are at "safe" levels. It's only "unsafe" from the one side of the house where my bedroom is located! As suggested in the documentation, I put up some aluminum foil on the bedroom window and that dramatically reduce the RFs coming in. I should mention with the meter, I could tell the bedroom wall was also blocking some of the RFs but the foil was more effective! That was interesting to know. The meter itself is sturdy and well built. It comes with its own case. There's a pamphlet and fast startup card as documentation. People complain about the backlighting and sound toggle buttons being in the battery compartment but it doesn't bother me at all. I have the backlighting always ON and don't use the sound. I don't have the battery popping out problem. Maybe it's because I bought it new. I've read conflicting reviews, 5 stars and 1 star, from people who say they are electrical engineers. Some say this meter is good and others say it's junk. It's hard to judge who is right. This is my first EMF meter. For my purposes, it works well. Using my "new eyes" analogy previously mentioned, I just need to detect an unseen light is there and that it's strong enough to hurt me. I don't need to know the exact details of the light. I need to know how I can weaken that light and be able to detect it's now weaker and at safe levels.
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Reviewed in the United States on November 13, 2024 by The Amazing Kato
I have had this meter for years and it is super helpful in so many ways. I am EMF sensitive so this helps mitigate anything I might be sensing and has helped us become Wifi free and an EMF safe home. Very easy to use, and the customer support has been excellent. Currently this comes with us on home searches. Even though I research how far potential new homes are from cell towers, you would be amazed at how not all cell towers are created equal. This saved us from a potential neighborhood over a mile away from a tower (which is always my goal). I had driven by this tower multiple times without my meter and was feeling sick. When homes over a mile away from this tower popped up I was interested but knew it would be wise to do some due diligence. Very grateful we checked because my concerns were validated and the all the levels were very high. My heart breaks for those living anywhere near this tower because they likely have no idea... I've taken off one star because some building biologists I've spoken to have stated while Trifield is excellent at detecting dirty electricity, magnetic fields, and similar, it is a bit inconsistent at detecting accurate R/F from wifi, bluetooth, etc. My experience with that has been that it consistently gives a good indicator, baseline, and warning on what may need mitigation and I still recommend it. I will eventually get a Safe and Sound Pro which specializes in that, but for now this has served its purpose very well.
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Reviewed in the United States on July 28, 2026 by L.Hope
Everyone should have this meter because it helps you find the electrical hotspots in your living area. The older Trifield was not so valuable but this newer one has audio and a digital readout, very efficient at helping assess problem areas. We had a bed with huge ELF readings right at the pillows. Bed got moved to a safer wall and we sleep well now. Had a desk where everyone got headaches and the Trifield showed it was blazing with bad energy so we moved the desk away from the hot wall. We asked our electrician why we have some walls that are so high in electromagnetic energy-- showing up to 360 volts on the electric dial-- and he does not know. He checked the outlets and they were balanced correctly but there is something wrong with our old wiring that defies conventional knowledge. If you can't afford to tear out walls and put your wiring in protective conduit, like the building biologists now recommend, then at least use this meter to help you locate your hot spots and reconfigure your furniture accordingly. Low frequency exposure over time badly drains the body's energy. Don't sleep in it above all. Get your bed to a very low electromagnetic area for a better life. And while you're at it, turn off your blasted carcinogenic Wi-Fi. That's loaded with both low frequencies and microwaves-- a ticket to aging and disease. We don't know if the microwave portion of this new meter is responsive to Wi-Fi because we learned long ago to keep a microwave-free house.
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Reviewed in the United States on December 29, 2019 by Ann Winston
I really like this meter. Seems to be very accurate. One thing that would be great if they would add would be some kind of an ability to look at history. RF frequencies are very difficult to kind of track down and they come and they go. One thing that this does, it tells you the peak and then it also tells you the average, which is very helpful. But when when the levels change so much it can be a little overwhelming to get a handle on it so that’s why I suggest some kind of a history where you could look at maybe a period of several minutes and take the average over that timeframe. Download it and analyze it. But other than that, the device is great. One other thing I would suggest to the company is that they add some kind of a handle or a grip to the to the meter because it’s a little slippery and I have to be careful that I don’t drop it. There’s a few other minor things but overall I think it’s a great meter.
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Reviewed in the United States on January 29, 2026 by ManFromIdaho
I've used my Trifield meter for dozens of hours and I've read every review I could find. And I've rented more expensive equipment in the past. My conclusions are that this meter is a great value and it makes it fun to start exploring the fascinating and hidden world of EMF. I really like it. If you're new to EMF, I recommend you start by taking magnetic and electrical EMF readings of the electrical devices in your home, including digital alarm clocks, ovens, microwave ovens, toaster ovens, vacuum cleaners, refrigerators, table lamps, and where applicable, power cords. Pick a distance away from the devices that you want to use, be consistent and if appropriate, take readings with the devices on and off. I'm not sure if 6" is better or 12" is better. Pay more attention to Peak values than average values. Next, I'd take RF readings from your smartphones, tablets, WiFi routers and/or access points and other WiFi devices like thermostats, door locks, cameras and sensors. It's harder to get good readings from these devices because the signals vary a lot. Focus on Peak readings and take your time. You will be taking 2 types of readings: (1) EMF being emitted from devices and (2) resultant emissions on you sitting or laying down where you spend a lot of time. For the former, use a predetermined distance away from the devices. For the latter, physically rotate so you get readings from all angles. After doing all of this you might be satisfied and stop. If so, you've received your money's worth. But for many others like me, this will be the beginning of a quest to gain a deeper understanding of what's on, why and how to manage your risk. There's a big debate about what's safe and what isn't. I need to find out for myself.
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Reviewed in the United States on May 28, 2020 by Demosthenes Pasadis
This is one of the best EMF meters out there. Good luck finding a cheaper EMF meter for what this one meter can do. So, what are its flaws? As stated by other reviewers here, you have to take the back cover off to adjust the audio. However, that's no big deal to me. Another con is that it's not as sensitive for measuring radio/microwave radiation. It is not going to be nearly as accurate as say, the Acoustimeter. The differences in price ranges speaks volumes. Not to mention, the 9-V batteries in all of these EMF meters are awful. This critique is not exclusive to only the TF2. It makes you wonder if the products would be better off with two 9-V batteries. I personally want batteries that are going to last over 150 hours, not 24 hours. Now that we got all of that out of the way, make no mistake, the TriField 2 is a top 3 product. Needless to say, it detects magnetic, electric, and radio/microwave radiation. The only other EMF meter that I can think of that does the same is the Cornet ED-88T. Though, the TF2 detects magnetic and electric better than this Cornet model. If you want an EMF meter that detects these three types of electromagnetic radiation, which is more sensitive to RF, purchase the Cornet ED-88T. The only other downside to this Cornet is that it might be a bit difficult to use for the average joe. Furthermore, I've personally tested the TF2 nearby a few power lines and electric towers up against the Alpha UHS Gaussmeter, which is outrageously overpriced, and surprisingly enough, the TF2 is just as good. The tri-axis for magnetic is what makes this possible. The numbers fluctuate every couple of seconds, but remember that the peak number in the top left corner of the screen is the most important. This shows the user the highest number the device recorded in that specific area. Let me repeat it, the TF2 is great for detecting magnetic. Additionally, don't touch the meter when you're measuring electric. A lot of people here don't seem to know how to use it. Due to potassium, magnesium, calcium, sodium, and other natural elements in a person's system, our cells naturally cause ourselves to show up on these electric meters due to electrical currents. Don't touch the meter at all after you've switched it to electric. For just under $200, you're not going to find a cheaper EMF meter that detects these three types of electromagnetic radiation at the same accuracy the TF2 can. The +/- 4% and +/-5% for magnetic and electric is huge. The lower the numbers for accuracy, the better, which explains why detection of RF is not as good with the TF2 because of +/-20% sensitivity.
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Reviewed in the United States on May 24, 2019 by James F.