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1. An instrument used for measuring small differences in electrical potential.
2. An electrical resistor of fixed total resistance between two terminals, but with a third terminal attached to a slider that can make contact at any desired point along the resistance.
[L. potentia, power, + G. metron, measure]


Etymology: L, potentia + Gk, metron, measure
a voltage-measuring device.


A voltmeter.

calibration potentiometer

A mechanically adjusted resistance used as a calibration control on many instruments. It adjusts a voltage or current within the device.
References in periodicals archive ?
Precision resistance adjustments are performed with a laser on ceramic, compared to trim pots on PCBs.
EPAD op-amps cost no more than conventional devices and may ultimately offer improved reliability and considerable cost savings by eliminating mechanical trim pots and manual trimming.
Maximum speed, offset adjustment, current max, and gain can be set via trim pots or alternatively set via RS232 or a CAN bus.