... in power system,building automation DW series 3-phase True Effective Value Energy Meter(RMS)DW/MDW 3-line LED display 1) Input:true ... Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer Relay, Solid State Relay, Proximity Sensor, ,Pressure sensor ,load cell sensor, KNE KSC box ...