... Sensor Indicator & Sensor Meter Toky SV8 model Sensor Indicator / pressure meter with following features: 1) Wide input signal range: mA ... ouput, or +/-12V (60mA) auxiliary power output (for sensors);5) Some model with retransmit 4-20mA current output, range ... data;8) Usually used with 2-wire transducers, pressure sensors, 4-wire weighting sensors, remote pressure meters, etc. which outputs mA, mV, V ...