Description ZMPT101B AC Single Phase Voltage Sensor Transformer Module ZMPT101B AC Voltage Sensor is the best for the purpose of the DIY project, where we need to measure the accurate AC voltage with a voltage transformer. This is an ideal choice to measure the AC voltage using Arduino/ESP8266/Raspberry Pi like an open source platform. In many electrical projects, engineer directly deals with measurements with a few basic requirements like High galvanic isolation, Wide Range, High accuracy, and Good Consistency. Onboard precision miniature voltage transformer, The active phase AC output voltage transformer senor module. Onboard precision op-amp circuit, the signal sampling, and appropriate compensation for precise functions. Modules can be measured within 250V AC voltage, the corresponding analog output can be adjusted. It is brand new, good quality, and high performance.     Pinout: