ZMPT101B AC Single Phase Voltage Sensor Module

The ZMPT101B AC Voltage Sensor Module is a highly accurate and compact sensor designed for measuring AC mains voltage (0–250V AC) in electronic and IoT projects.
It uses the ZMPT101B precision voltage transformer, which provides excellent isolation and stability.
The module outputs an analog voltage proportional to the AC input, making it easy to interface with microcontrollers like Arduino, ESP32, STM32, and Raspberry Pi (via ADC converters).

It is commonly used in energy monitoring, voltage detection, smart home systems, and protection circuits.

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Features

• Based on ZMPT101B precision AC voltage transformer
• High accuracy and strong anti-interference performance
• Adjustable onboard potentiometer for gain control and calibration
• Excellent electrical isolation from high-voltage AC mains
• Designed to measure single-phase AC voltages up to ~250V AC
• Output is analog signal suitable for ADC reading
• Simple 3-pin interface: VCC, GND, Analog OUT
• Works with 5V power supply
• Small, easy-to-mount module

Applications 

• AC mains voltage monitoring
• Smart energy meters
• IoT-based home automation and power monitoring
• Industrial voltage sensing and logging
• Over-voltage/under-voltage protection systems
• Real-time power quality monitoring
• Inverter and UPS voltage feedback
• Smart plug or socket voltage detection
• Battery-less remote voltage measurement (via isolation transformer)
• Educational and DIY electronics projects involving AC analysis