... alarm,8 segments output control DW series Single phase Electric Meter(vol/ampere/power/frequency/power factor) Features: 1) Input ... as voltage/ampere/power/power factor/frequency/electrical degree/reactive power/power frequency.2) Accuracy:0.2%,voltage/ampere ... Coulometer, Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer Relay, Solid State Relay, Proximity ...