Dirty Electricity Line EMI Monitor

DOCUMENTED CAPABILITIES

Manufacturer

TriField

Field types

Line-conducted EMI ("dirty electricity") — not RF, electric or magnetic fields

Frequency range

10 kHz–10 MHz

Line noise range

0.1–1999.9 mVp-p AC (differential); accuracy ±8% at 20 kHz–2 MHz, within a factor of 2 from 10 kHz–10 MHz

Voltage reading

85–250 VAC (±1 VAC); operates on 85–300 VAC, 50/60 Hz

Display

4-digit yellow/blue two-colour OLED; audio tone scales with EMI intensity

Suggested reading guide

Below 25 mV: low. 25–50 mV: marginal. Above 50 mV: high (per manufacturer)

This Dirty Electricity Monitor measures electromagnetic interference (EMI) on single-phase AC power lines. Simply plug it into a wall socket for instant line-noise readings. The built-in speaker provides audible feedback, helping you detect and identify potential sources of electrical interference.

What to check

Measures line-conducted electrical interference only — it does not measure RF, electric or magnetic fields, so it is not a substitute for a general EMF meter. No battery required; needs a free wall outlet to use.

Confirm the exact model revision and the measurement conditions that matter to your use. Detection coverage is not a guarantee of uniform accuracy.