The instruments we use on products
Meters are tools. The test is the product. These are the instruments we put in front of products that claim to block EMF — what each one measures, the frequencies it covers, and why numbers from different meters can't be compared head-to-head.
EMF meters differ in the frequency bands they cover, how they capture peaks versus averages, and how they're calibrated. Point two different meters at the same Wi-Fi router and you'll often get two different numbers — both correct for that instrument. That's exactly why we never blend raw readings across meters: the headline is the average of each meter's own percent change, and each meter only counts when its baseline clears its resolution floor (TriField TF2 ≥ 1, GQ EMF-390 ≥ 20 µW/m²). Every published lab test names the meters used and lists each pair.
Home Meters 3 meters
The tools we own for product tests. We match the meter mode to the claim — RF, magnetic, or electric. The standard paired test runs on the TriField TF2, and on the GQ EMF-390 as well when the field is strong enough for it to read — one meter or two, both are complete tests. At the levels most product tests produce the GQ sits under its own resolution floor, so many results are a TriField TF2 pair on its own. The ERICKHILL is a budget detector we keep for quick checks but no longer count toward a verdict. Absolute numbers from different meters are never mixed into one reading — each meter is judged by its own percent change.
TriField TF2
RangeRF 20 MHz–6 GHz · Magnetic 40 Hz–100 kHz · Electric 40 Hz–100 kHz
3-in-1 meter. RF up to ~20,000 µW/m² (0.001–19.999 mW/m²), magnetic 0.1–100 mG, electric 1–1000 V/m.
ERICKHILL 3-in-1 EMF Meter
RangeRF 50 MHz–3.5 GHz · Electric & magnetic 5 Hz–3.5 GHz
Budget rechargeable 3-in-1 that reads all three fields at once — popular with hobbyists and for quick home checks. RF 0.01–300 mW/m², magnetic 0.1–999.99 mG, electric 1–1999 V/m. An entry-level detector rather than a lab instrument, so treat its numbers as indicative.
GQ EMF-390
RangeRF up to 10 GHz · Magnetic 3-axis (X/Y/Z) · Electric frequency-independent
The widest RF reach in the home tier: power density readings up to 10 GHz, so it still sees Wi-Fi 6E and high-band 5G that sit above where most home meters stop. RF 0.02–9999 mW/m², magnetic 0–500 mG across three axes, electric 0–1000 V/m. Adds flash data logging and an RF spectrum analyzer, though the analyzer's own bands top out around 2.5 GHz. Busiest interface of the home meters.
Professional instruments exist. We don't use them for published product tests.
Ranges and specifications are drawn from each manufacturer's published data. Lab product tests name the meters used and list each pair. Reader-submitted readings always name the meter that captured them, so you always know how a number was measured.