Hall Effect Magnetic Sensor Module with LM393 Comparator
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Prices updated: 12 Oct 2026
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About this product
A Hall effect magnetic sensor module with an LM393 comparator and an adjustable sensitivity potentiometer. It gives a digital switching output that goes low when a magnetic field exceeds the set threshold, with a signal indicator LED and a mounting hole for easy installation. It operates from 3.3 V to 5 V and suits magnet detection projects with Arduino or ESP32.
Specifications
- Operating voltage
- 3.3V-5V
- Comparator
- LM393
- Output format
- Digital switch output (0 and 1), active low
- Sensitivity
- Adjustable
- Indicator
- Signal LED
- Mounting
- Retaining bolt hole
Frequently asked questions
How do I wire this sensor to a microcontroller?
Connect the power pin to 3.3 V or 5 V, the ground pin to GND, and the digital output to a digital input pin. The output goes low when the magnet is detected, so read it as an active-low signal.
How do I adjust the detection sensitivity?
Turn the onboard potentiometer to change the threshold at which the comparator switches. The signal LED lights when the output is triggered, which helps you confirm the setting while testing.
