Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "voltmeters" in a sentence
"A number of radioactive devices serving as resistors, electrostatic voltmeters, leveling systems, and micrometers took up Blau's creative time."
"This 15-day course taught students to manufacture suicide belts, how to tuck the belts around their waists and how to test the battery and voltmeters."
"Here, it will suffice to know that the current can be measured by means of ammeters and the voltage by means of voltmeters with adequate accuracy."