Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	ZMPT101B
Input Voltage Range	AC 0-250V
Output Type	Analog Voltage Signal
Phase Configuration	Single Phase
Operating Frequency	50Hz / 60Hz
Linearity Error	< 0.5%
Supply Voltage	DC 5V
Isolation Method	Electromagnetic Induction
PCB Dimensions	32mm x 20mm
Primary Application	Smart Metering & Energy Monitoring

6 reviews

Anonymous

Mar 29, 2026

Rating: 4/5

Good value, needs careful calibration

The build quality is solid for the price. You do need a multimeter to calibrate it correctly, but once set, it holds the value well. Just ensure your input voltage stays within the rated limits.

Anonymous

Mar 28, 2026

Rating: 5/5

Reliable isolation

Safety was my main concern, and this transformer provides good galvanic isolation. I've been using it to monitor mains voltage in a prototype enclosure for three weeks without issues.

Anonymous

Mar 27, 2026

Rating: 5/5

Consistent performance

I bought five of these for a batch of sensors. All of them performed consistently after calibration. The linearity is impressive for a module at this price point.

Anonymous

Mar 21, 2026

Rating: 4/5

Compact and effective

Small footprint fits nicely into tight enclosures. The signal is clean, though I added a small capacitor to smooth out minor noise in my specific environment. Overall very satisfied.

Anonymous

Mar 10, 2026

Rating: 5/5

Great for university projects

Used this for my final year electrical engineering project. It interfaced easily with the ADC on my microcontroller. The documentation online is also quite helpful for beginners.

Anonymous

Mar 05, 2026

Rating: 5/5

Perfect for Arduino energy projects

This module works flawlessly with my ESP32 setup. The output is stable and the calibration potentiometer makes it easy to tune for accurate readings. Highly recommended for DIY smart home meters.

5 FAQ

Q: Is this compatible with 3.3V logic microcontrollers?

A: Yes, but please note the output swing may exceed 3.3V depending on calibration. We recommend using a voltage divider or an op-amp circuit to scale the output if connecting directly to 3.3V GPIO pins.

Q: Does this come with headers soldered?

A: This module typically ships with unsoldered pin headers to allow for flexible mounting options. You will need to solder them yourself or use jumper wires directly on the pads.

Q: How do I calibrate the output voltage?

A: There is a multi-turn potentiometer on the board. Apply a known accurate AC voltage to the input, measure the output with a multimeter or MCU, and adjust the pot until the reading matches your reference.

Q: Can this module measure DC voltage?

A: No, the ZMPT101B is designed specifically for Single Phase AC voltage measurement only. It will not provide accurate readings for DC sources.

Q: What is the maximum safe input voltage?

A: While the module can technically handle spikes, we recommend keeping the continuous input voltage under 250V AC to ensure longevity and safety. Always use appropriate fuses in your circuit.

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