ZMPT101B 0-250V AC Voltage Sensor Module
ZMPT101B Single Phase AC Voltage Sensor Module – 0-250V Range
The ZMPT101B is a high-precision single-phase AC voltage sensor module capable of measuring AC voltages from 0 to 250V RMS. Based on a miniature potential transformer, it provides galvanic isolation between the high-voltage AC side and the low-voltage measurement circuit, ensuring safety and noise immunity. The module outputs a corresponding 0–5V AC analog signal, which can be read by any microcontroller with an ADC. It’s ideal for building energy monitors, overvoltage protection systems, and IoT-based power logging applications.
Key Specifications
| Specification | Value |
|---|---|
| Input Voltage Range | 0–250V AC (RMS) |
| Output Signal | 0–5V AC (adjustable via trimmer) |
| Supply Voltage | 5V DC |
| Non-linearity | <0.2% |
| Isolation Voltage | 2000V |
| Dimensions | 49.5mm × 19.4mm |
What You Can Build With This
- Smart home energy monitor with Arduino and WiFi dashboard
- Overvoltage/undervoltage protection relay for appliances
- Mains power quality data logger with SD card
- Automatic voltage regulator with real-time feedback control
Compatibility
Works with any microcontroller having an analog input: Arduino Uno/Nano (5V logic), ESP32/ESP8266 (3.3V logic with output scaling), Raspberry Pi (via external ADC), STM32, and more. The onboard potentiometer lets you calibrate the output amplitude to match the microcontroller’s ADC range. For 3.3V systems, simply adjust the trimmer until the maximum expected AC voltage corresponds to ~3.3V peak output.
Wiring Notes
Connect VCC to 5V DC, GND to ground, and OUT to the microcontroller’s analog pin. The AC voltage to be measured connects to the sensor’s high-voltage terminals – no direct connection to the low-voltage side is required due to transformer isolation. Exercise caution when wiring mains voltage; ensure all connections are insulated and the board is mounted securely away from touchable areas.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino?
Yes, simply connect VCC to 5V, GND to GND, and OUT to an analog pin (e.g., A0). Use analogRead() to sample the instantaneous AC waveform, then calculate RMS values in software. Calibration may be needed using the onboard potentiometer.
Can I measure three-phase AC voltage?
This module is single-phase. For three-phase systems, use three separate ZMPT101B modules, one per phase, with each isolated appropriately. Ensure all three share a common ground on the DC side if your microcontroller uses a single ADC.
Does it require calibration?
The output amplitude is adjustable via the trimmer. Before final use, apply a known reference voltage (e.g., 230V AC) and adjust the potentiometer until the output swing matches your ADC’s input range for accurate RMS conversion.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
What you can build with this
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items