... to sensor for pressure,weighing,humidity,et DS3A series 4 LED Sensor Processor Features:1) Signal input:regular:4-20mA/0 ... range settable:up to 2 alarm output.4) Big inch LED 4 digit display,range:-1999~9999 floating point.7) Communication ... , Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer Relay, Solid State Relay, Proximity Sensor, ,Pressure sensor ,load cell ...