The TRIFIELD METER - (http://www.4ehsbyehs.com/emr-meters/trifield100, http://www.norad4u.com/monitor/home-emr-meters/tri-field-100xe) is an excellent and very accurate 3 axis low frequency electromagnetic radiation meter. It can also measure electric field and high frequency (RF) electromagnetic radiation, but I found it to be less usable. The TRIFIELD METER can measure high frequencies of electromagnetic radiation but only from the high level of 10 uW/cm2. The TRIFIELD METER is most usable for low frequency measurements.
The TRIFIELD METER has an analog display with 3 scales, and a big selector switch on the front, that can select between the different operation mode of the TRIFIELD METER (OFF, Battery test, low frequency magnetic 0-100 mG, low frequency magnetic 0-3 mG, electric and radio/microwave modes.
The TRIFIELD METER uses a 9 V battery, and needs to be opened (unscrewing 4 bolts on the back cover) in order to change it. I have it now for 2 years and I have never changed the buttery (very important to switch it off at the end of use).
I use the TRIFIELD METER a lot for measuring low frequency electromagnetic radiation levels, for finding EMF sources, both in house and outside the house.
• Very accurate low frequency.
• Very simple and easy to use.
• Voice indication in some of the modals.
• Big and clumsy
• Changing the battery may prove to be not so easy.
• Not sensitive in high frequency.
Button line: One of the best low frequency EMF meters.