If you are under a certain age, you might not know the initialism VTVM. It stands for vacuum tube voltmeter. At first glance, you might just think that was shorthand for “old voltmeter” but ...

The voltmeter has a fixed measurement range from 0 to 100 VDC, the only switches on the board are for powering it on and a hold button, which freezes the value currently being shown in the three ...

But imagine a voltmeter so small that it can slip into a living cell and measure the voltage across the outer layer of structures known as organelles. That’s what a team of researchers at the ...

A d'Arsonval galvanometer of the type described above. A second voltmeter type uses taut-band suspension, which also employs a moving coil. Taut-band meters eliminate the pivot and jewel mechanism ...