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Technology - Potentiometer

A linear potentiometer is a device with a movable slider, usually called wiper, that makes electrical contact along a fixed resistance strip. A regulated DC voltage is applied to the two ends of the resistance strip: the voltage between one end of the strip and the contact point of wiper and strip is measured as the output signal.
Sisgeo instruments that utilize linear the linear potentiometer technology have often a 4-20mA output because electrical (Ampere) signals are more suitable for long distance transmission than tension (Volt) signal.