... ,power.frequency,power factor,reactive power,etc. 2011--Industrial Energy Meter, digital Watt Meter(Wattmeter) Features: Power Supply80-260V AC/DC or 18-30V AC ... Temperature Controller, Digital Adjustor,thermocouple (TC and RTD), Panel Meter, Sensor Meter, inductor, Power Meter, Coulometer, Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter,Timer,Timer ...