... operate.3)Isolated 4-20mA/20-4mA output; measure range settable: 2 relay alarm output, mode selectable.4)Big inch LED 4 ... digit display, range:-1999~9999 floating point.5)Communication:RS232 ... Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer Relay, Solid State Relay, Proximity Sensor, ,Pressure sensor ,load cell sensor, KNE KSC ...