... . ZW series DC Power Meter/Coloumeter--2011 ZW8 Flat typeZW8 flip type Features: 1) True effective measure: voltage, current, active power, reactive power, power factor, frequency ... models of products, including Temperature Controller, Digital Adjustor,thermocouple (TC and RTD), Panel Meter, Sensor Meter, inductor, Power Meter, Coulometer, Voltage Meter ...