ZMPT101B 2mA Active Single Phase Voltage Sensor Transformer Module AC Output Voltage Sensor for Arduino

Product Description

The ZMPT101B AC Voltage Sensor Module is a high-precision voltage measurement module designed for sensing and monitoring single-phase AC voltage signals up to approximately 250 V AC. It uses an onboard ZMPT101B precision micro voltage transformer along with a high-precision operational amplifier circuit to provide a conditioned output signal suitable for measurement and monitoring applications.

The module provides an isolated AC voltage sensing interface, allowing the AC input signal to be converted into a low-level analog output waveform that can be processed by a microcontroller or ADC. The output is a sine-wave signal with a DC midpoint, making it suitable for AC voltage measurement using platforms such as Arduino, ESP32, STM32, and other embedded systems.

An onboard potentiometer allows adjustment of the output waveform amplitude according to the measurement circuit requirements. The module operates from a 5–30 V DC supply and is suitable for power monitoring, energy measurement, automation, and electrical sensing projects.

Features

• Based on ZMPT101B precision voltage transformer
• Designed for single-phase AC voltage measurement
• Supports AC voltage measurement up to approximately 250 V
• High-precision onboard amplifier circuit
• Analog sine-wave output
• DC midpoint on output waveform
• Adjustable output amplitude
• Onboard potentiometer for signal adjustment
• Electrical isolation between sensing and output circuits
• 5–30 V DC operating supply
• Suitable for microcontroller-based voltage measurement
• Compact and easy-to-use module

Specifications

Parameter	Specification
Module Type	AC Voltage Sensor
Voltage Transformer	ZMPT101B Precision Micro Voltage Transformer
Input Measurement	Single-Phase AC Voltage
Measurement Range	Up to Approximately 250 V AC
Output Signal	Analog Sine Wave
Output Bias	DC Midpoint
Output Amplitude	Adjustable
Supply Voltage	5–30 V DC
Amplifier	High-Precision Op-Amp Circuit
Adjustment	Onboard Potentiometer
Application	AC Voltage Measurement and Monitoring

Working Principle

The ZMPT101B voltage transformer senses the AC input voltage and provides an isolated, reduced AC signal. The onboard amplifier circuit conditions and compensates the signal before providing it at the OUT terminal.

The resulting output is a sine wave with a DC offset around the waveform’s midpoint, allowing it to be measured by an ADC or analog input of a suitable microcontroller.

The onboard potentiometer can be adjusted to change the amplitude of the output waveform without significantly changing its midpoint value.

Output Signal Adjustment

The output waveform amplitude can be adjusted using the onboard potentiometer. During adjustment, if waveform distortion occurs, increasing the module’s supply voltage within its specified 5–30 V DC range may help improve the signal.

If the output waveform’s midpoint shifts toward 0 V and removal of the DC component is required, an appropriate coupling capacitor/filtering arrangement can be considered according to the measurement circuit.

Applications

• AC voltage measurement
• AC power monitoring
• Energy meter projects
• Arduino voltage monitoring
• ESP32 voltage measurement
• STM32 voltage sensing
• Smart energy monitoring
• IoT power monitoring
• Industrial automation
• Electrical measurement systems
• Power quality monitoring
• AC appliance monitoring
• Grid voltage monitoring
• Embedded voltage sensing
• DIY electronics projects

Package Includes

• 1 × ZMPT101B AC Voltage Sensor Module

Product Disclaimer

The stated 250 V AC measurement capability is an approximate manufacturer specification. Actual usable measurement range and accuracy depend on the module calibration, supply voltage, connected ADC or measurement circuit, component tolerances, and installation conditions.

This module is intended for AC voltage sensing and should not be directly connected to a microcontroller input without appropriate signal verification and protection.

Working with mains AC voltage can cause electric shock, fire, or serious injury. Proper insulation, enclosure, fusing, wiring, and safety precautions must be used. Mains connections should be performed by a qualified person.

The onboard potentiometer should be adjusted carefully while monitoring the output waveform to avoid exceeding the safe input range of the connected measurement circuit.

Product images are shown for illustrative and representational purposes only. The actual product colour, dimensions, component placement, and appearance may vary slightly depending on the manufacturing batch.