... factor,reactive power,etc. 2011--Industrial Energy Meter, digital Watt Meter(Wattmeter) Features: Power Supply80-260V AC/ ... Alarm OutputRelay/SSR output for any power parametersSampling Speed<0.2s Communicaiton RS485 / RS232 MODBUS RTU ... TC and RTD), Panel Meter, Sensor Meter, inductor, Power Meter, Coulometer, Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer ...