Ideally, dirty electricity (EMI) levels should be below 25 millivolts (mV). Levels between 25 and 50 mV are marginal and should be reduced if possible. Levels above 50 mV are undesirable and steps should be taken to lower them.
The TriField Dirty Electricity EMI Meter can be used to measure dirty electricity on 50/60Hz AC circuits with a voltage anywhere between 100V and 240V.
The meter is compatible with 50/60Hz AC electrical circuits with a voltage anywhere between 100V and 240V. This means it can be used in many countries around the world with the correct adapter.
5.2 x 3.6 x 1.6 inches; 132 x 91 x 41 mm
The Line EMI Meter measures electromagnetic interference in a single-phase AC power line. It plugs into a wall outlet (mains socket) and requires no battery. It immediately displays total line noise in millivolts (range 1999 mV, resolution 1 mV) in the frequency range 10 KHz – 10 MHz (the frequency limits at which sensitivity is ½ of the maximum sensitivity). A speaker plays the sound of the EMI, amplitude demodulated, in order to identify the EMI source (such as an AM or shortwave radio station vs. a motor vs. an electric arc).