When you need a multimeter for testing electrical equipment around the home, it's vital to know what all those symbols around ...

[Big Clive] had some 22mm digital AC voltmeters, made to put in a panel. There was a time when this would have been a significant pain, since it required you to make a large square hole. Of course ...

The DMR20-1-ACV "nanometer" self-powered four-digit bright LED voltmeter from Murata can measure the true RMS value of its input from 85 to 264 VAC to within 0.1 V resolution.