The DMS-20PC-4/20S-C is a subminiature 4-20mA loop-powered LED Process Monitor with self-powered, no external supply required, unipolar reading models. High-quality, 20-turn, span (gain) and zero (offset) adjustments. DIP-switch selectable range and decimal points with hundreds of input/readout combinations. Vibration-resistant package, reliable screw-terminal input connections.