Draw Wire Transducer with 4-20mA Output, 50mm to 2m,

 UniMeasure's original basic design P420 position transducers provide a 4 to 20 mA output signal using a potentiometric sensor.

Since the transmitter is loop powered, an assembled system consists of a power supply, current monitor, and transmitter all connected in series. The P420 is particularly insensitive to electrically noisy environments. There are 13 measurement ranges avaialble , the shortest being 0-50mm and the longest 0-2000mm.