The ZMPT101B AC Voltage Sensor Module is a high-precision voltage sensing solution designed to measure AC voltage safely and accurately using an onboard precision voltage transformer. It provides electrical isolation between the high-voltage AC side and the low-voltage measurement circuitry, making it ideal for energy monitoring, smart meters, power analysis, and automation systems. The module outputs an analog signal suitable for microcontroller ADC inputs.
Core Sensor Specifications
• Sensor Type: AC voltage measurement module
• Sensor Element: Precision voltage transformer (ZMPT101B)
• Measurement Type: Single-phase AC voltage
• Output Signal: Analog voltage proportional to AC input
Electrical & Interface
• Operating Voltage: 5 V DC
• AC Input Voltage Range: Up to 250 V AC (module dependent)
• Output Type: Analog (centered around mid-supply)
• Interface Pins: VCC, GND, OUT
• Sensitivity Adjustment: Onboard multi-turn potentiometer
Performance Characteristics
• High measurement accuracy with proper calibration
• Excellent electrical isolation for safety
• Stable output suitable for RMS calculations
• Low phase error compared to resistor-divider methods
Physical Characteristics
• Module Type: PCB-mounted AC voltage sensor
• Transformer Type: Encapsulated ZMPT101B
• Compact and robust design
• Screw terminal for AC input connection
Compatibility
• Arduino Uno / Nano / Mega
• ESP8266 / ESP32 (ADC range matching required)
• Raspberry Pi (with external ADC)
• Energy monitoring and smart meter systems
• Industrial and home automation controllers
Key Advantages
• Safe isolated AC voltage measurement
• Adjustable sensitivity
• High accuracy for low and high AC voltages
• Suitable for long-term monitoring
Technical Insights
• Requires software RMS calculation
• Calibration needed for accurate voltage readings
• Output is AC waveform centered at reference voltage
• ADC resolution affects measurement precision
Applications
• AC mains voltage monitoring
• Energy meters and power analyzers
• Smart home energy management
• Industrial AC monitoring systems
• Educational power measurement projects
Pro Tip
• Always calibrate using a known AC voltage
• Keep AC wiring properly insulated
• Use averaging for stable RMS values
• Ensure ADC reference voltage matches output range
Package Includes
• 1 × ZMPT101B AC Voltage Sensor Module