|Item Weight||8 ounces|
|Product Dimensions||12.7 x 6.6 x 6.1 inches|
|Item model number||100XE|
|Batteries||1 Lithium ion batteries required. (included)|
|Item Package Quantity||1|
|Battery Cell Type||Alkaline|
Trifield 100XE EMF Meter
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- Magnetic, Electric, and Radio/microwave Detection All in One Package
- Omni-directional electric and magnetic sensitivity
- Hand-held portability and simplicity.Meter size:5.0 x 2.6 x 2.4 inches.Frequency range:50 MHz – 3000 MHz (3 GHz)
- Two magnetic ranges cover 0.2-100 milligauss, Electric range covers 5-1000 V/m, Radio/microwave covers 10 to 1000 microwatts/square cm
- Made in USA
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The Trifield Meter is a gaussmeter, electric field meter and radio field strength meter in a single unit. When measuring electromagnetic fields (EMFs), the primary concern is usually magnetic fields, which can be tricky to measure. If a less sophisticated 1-axis gaussmeter is used, a reading of zero could result even where the field is strong. A 1-axis meter must be oriented correctly to measure the field (which is a vector). The 3-axis Trifield Meter solves that problem by measuring the true strength of the field regardless of which way it is oriented. Therefore, the Trifield Meter can be scanned rapidly across an area without having to stop at each point to search for the orientation that gives a maximum reading. Another section of the meter detects AC electric fields, which can exist independently of AC magnetic field. The third section detects radio/microwave, such as from a leaky microwave oven. Analog (needle-type) display has very fast response time compared to digital. This meter is good for measuring AC (artificial) magnetic fields rapidly, AC electric fields rapidly, such as from overhead power lines or improperly grounded equipment. Can locate wiring in walls (using the 100XE version) and major RF/microwave sources such as leakage from microwave ovens, or the field near cell towers. Operates about 40 hours on replaceable standard 9V battery, has a low battery indicator.
From the Manufacturer
The TriField Meter is the only EMF meter which offers magnetic, electric, and radio/microwave detection in one package. This meter combines all these unique features with affordable pricing for fast, reliable measurements of electromagnetic pollution: Continuous sampling analog readout; Omni-directional electric and magnetic sensitivity; Two separate scales for magnetic field readings; Hand-held portability and simplicity. The TriField Meter will accurately measure EMF pollution from these "hot spots" in your home, office, or work environment so you can take steps for "prudent avoidance": poorly grounded wiring, microwave oven doors, dimmer switches, strong analog RF transmitters, automobiles, TV's & computers, and other electronic equipment.
Please note: this product is intended to measure electric fields, and does not detect nuclear radiation.
Top customer reviews
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My wife's EHS has virtually derailed our lives for the last three months, and I honestly do not know what we would do without this meter at this point. With it, we can detect problem areas in our own home and in the public places she frequents. So far, we have discovered we needed to eliminate all compact fluorescent bulbs even though I love the quality of light they produce. We have replaced them with bulb-shaped halogens that emit very low magnetic and electric fields. We determined that the microwave and oven had to be either unplugged or switched off at the breaker panel to keep the magnetic fields low enough in the kitchen for her to be safe. Simply having them off was not enough. I was able to measure the electric field strength of the full spectrum fluorescent tubes (twelve bulbs in three ceiling fixtures) in my studio where I make my living as a painter and sculptor: the fields were astoundingly strong. I then built shields using hardware cloth covering the entire bottom of the metal fixtures, ensuring these shields were grounded to the light fixture housing, and this reduced the electric fields to zero. I would never have been able to tell if I was successful had I not had a meter to measure the electric fields before and after. I have also used it to see how close to a floor lamp my wife can safely sit and keep the fields immeasurably small. And I have determined where in our Dodge van the magnetic fields are the lowest so she can sit in relative safety. I had not suspected those fields in a vehicle could be so strong...in some places pegging the meter on the high setting.
One of the best uses of this small meter is to take with me to places she goes regularly, like the gym. She is a workoutaholic, and such exercise is a real benefit to people suffering with EHS. But without a way to ensure her safety at the gym, workouts have been problematic. Some of the cardio machines emit almost no fields, some produce medium magnetic fields, and one an astoundingly strong magnetic field (the Fit Stride 95xi by Life Fitness). The earlier versions of this elliptical cross trainer are fine (the 9500 HR) for her to use, but she dares not get on the newer version. The magnetic field in the rear is astoundingly strong, especially when you are actually on the machine. Also at the gym, I was able to find out why she suffered a serious EMF hit several days ago. She had leaned against a wall to stretch and then got on the Life Fitness 9500 HR I mentioned above, which is near several TVs. She thought the hit was from the TVs or the elliptical machine, and so did I; but measurements yesterday determined that the TVs and the elliptical trainer were fine and that the problem was a set of three dimmer switches on the back side of the wall where she was leaning to stretch. Again, the magnetic field was pegged on the highest setting of the meter. So far, the dimmer switches have been the most dangerous thing we have yet encountered.
I have much mitigation work yet to do in our home to make it safe, and also many stores and other locations to investigate to keep her safe out of the house. This meter will be getting a lot of work, and so far it has been a real--literal--lifesaver. One of my wife's chief EMF symptoms is heart problems, and some people have actually died from such problems when they are left untreated. Part of the knowledge required to treat them is only obtainable with a meter to measure the fields in real time. So if you have any reasons to avoid EMF, I would suggest this meter as a prime purchase. One thing I have learned in measuring various fields is that, even for an engineer (biomedical engineering with a bunch of EE courses), much of this field strength measurement and detection is somewhat counter-intuitive. You need a good meter.
Two more things. First, as the description of this product mentions, it is capable of measuring magnetic fields in any plane because it has three separate antennae inside. Thus, it is much simpler to use than one requiring a particular orientation to be effective. Most meters in this price range cannot do that. Second, I honestly believe that given the proliferation of RF energy for everything from wireless networks to cell phones to garage door openers, more and more people are going to develop EHS over the next decade. My suggestion? Start reducing your exposure now by making changes in your own home. This meter will help. But you will also need an RF meter for all the devices mentioned above. My wife just had a serious hit from the WiFi network (both for customers and for the store's computers) at a local Whole Foods Market. She will no longer be able to shop there. But you need an RF meter to measure that field. The one I own is a Cornet Electrosmog Meter, the one with the extended range to reach fields of 6 GHz.
The two main problems: (1) in most places in my house, it reads twice as high for EMF versus a higher-end digital EMF meter owned by my power company, thus making it look like my house's EMF problem is much worse than it is and (2) it doesn't seem to discriminate between different frequencies of EMF so it registers high EMF both for 60 Hz hum and for higher frequency electrical hash that doesn't seem to bother me. During evening hours, it typically shows high EMF readings throughout the house making it essentially useless for pinpointing particular trouble spots. I suppose if I were take this meter's readings at face value, I could rewire my house, install EMF shields, apply EMF paint, and install plug-in EMF filters in an effort to resolve an EMF problem that really isn't a problem, so I'm glad I had the chance to see another EMF meter in action as a sanity check.
In the end, I've ended up identifying my worst EMF sources with a portable AM radio tuned off channel; this cheap and simple approach lets me distinguish between hum and hash and gives me a good idea of how far a given EMF source radiates. With this means, I've been successful in identifying several trouble spots involving parallel power and low-voltage cables, ground loops, etc., that were causing 60 Hz hum. (The meter does read high EMF in those areas, but it also reads high EMF most everywhere else too.) This has made my in-house EMF problem much more bearable without much expense.
As for this meter, it pretty much just sits on a shelf to remind me of the needless anxiety it caused me for the several weeks I took its high EMF readings to heart. Not recommended.
UPDATE #1: after posting my original review, I discovered an actual EMF issue in my house that had an actual effect on my health. It came to my attention while I was troubleshooting an issue with a strong humming noise in the background of some AM radio stations (e.g., 720 kHz). The noise was much worse when the overhead flourescent light fixture in my bedroom was turned OFF. Yes, you read that right! Many flourescent fixtures are well-known causes of RF noise, so it would be understandable if turning the fixture ON caused noise, but in my case I heard the reverse behavior.
It turned out that the problem was caused by incorrect wiring at the light fixture: reversed hot and neutral wires. Apparently the low current that's present on the circuit's neutral wiring was enough to keep the ballast transformer alive enough to generate EMF and RF interference. Since the neutral isn't controlled by a light switch, the current was present at all times. Thus, for the 10+ years that this wiring problem had been present, I'd been subjected to an elevated EMF field that interfered with my body's ability to sleep deeply. Ever since I corrected this wiring error, I've been sleeping much more soundly.
What does this have to do with the Trifield 100XE EMF Meter? Just this: the meter's poor accuracy for detecting EMF fields prevented it from showing a stronger EMF field in the vicinity of the miswired light fixture versus other areas of the house. Some time ago, when I had a rep from my electrical utility do an EMF scan using a higher-end meter, he DID detect a higher EMF reading in the vicinity of the light fixture, whereas the Trifield meter showed no difference in reading whether it was near the light fixture or in an entirely different room. At every other location in my house, my Trifield meter read at least 2X higher than the utility rep's meter. Unfortunately, I didn't yet have a good understanding of EMF, electrical wiring, etc., so I had to wait a couple of years before my AM radio noise issue led me to this smoking gun.
What good is it to know that your house has an EMF issue without giving any clue of the exact location of the issue? Moreover, what good is it to have the meter read 2X or more higher than is warranted by the actual EMF field, thus leading one to believe that one's home is unhealthy when in fact it is safe? Therefore, I have downgraded my rating of the Trifield meter from 2 stars to 1 star. One is far better off to use an AM radio to sniff out EMF/RFI or contact one's utility company or a home environment professional to get an accurate EMF reading than to invest in this product.
UPDATE # 2: I've learned that the Trifield EMF meter sold at this page reads high for EMF because of a feature called "frequency weighting." (There is another version of the Trifield EMF meter that is _not_ frequency weighted. You can find it here: Trifield Flat Version for 50hz and 60hz - Model 100xe With Aluminium Case. My criticisms do not apply to that model.) As I understand it, this causes the EMF reading to be multiplied or "weighted" if higher-frequency EMF supposedly associated with "dirty electricity" is detected. The reading might be multiplied by as much as 4. This is distinct from the behavior of a "flat" EMF meter which does not do any weighting/multiplication. Thus, a flat EMF meter might display a much lower reading than this model of the Trifield.
Since writing the original review and update #1, I've obtained a flat EMF meter (EMI Magnetic field gauss Meter detector MG-2000T Triple Axis Professional use Magnetic Interference from MRI Machines Industrial and Medical Equipment Power Lines Appliances EMF inspections) so I've been comparing it with the Trifield in many areas of my house. Without fail, the Trifield's EMF reading is 2X that of the flat meter. Even in the evening, when I get somewhat higher EMF readings than in the daytime, the flat meter reads 1.5 - 2.0 mG which looks a lot better than the 3-4 mG presented by the Trifield. What's more, the flat meter seems to be better able to identify strong EMF fields such as when it's placed within 2' of a transformer, and it consistently shows that the reading falls back to more normal values when it's moved away from the strong field. Thus, unlike the Trifield, the flat meter is actually useful for pinpointing specific EMF sources such as the wall wart transformer I had plugged in within a few feet of my bed.
My advice: if you're going to get an EMF meter, steer clear of the frequency-weighted Trifield and invest in a flat EMF meter instead. You'll have a much better chance of pinpointing specific EMF sources and won't get unnecessarily worried by artificially high readings.