The Dirty Electricity Meter measures electromagnetic interference in a typical domestic single-phase AC power line.
 
Simple operation by plugging into a wall outlet (mains socket).
 
It will immediately displays total line noise in millivolts peak to peak (range 1999.9 mVp-p, resolution 0.1 mVp-p).
 
Covers a large frequency range of 10 KHz – 10 MHz.
 
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).
 
No batteries required.
Case not supplied.