Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	3144
Sensor Type	Hall Effect Switch
Operating Voltage	3.3V - 24V DC
Output Type	Digital Open Collector
Detection Range	0-10mm (depends on magnet strength)
Response Frequency	Up to 50kHz
PCB Dimensions	22mm x 16mm x 4mm
Mounting Hole Diameter	3mm
LED Indicator	Yes (Power and Signal)
Application	Motor Speed, RPM Counting, Position Detection

6 reviews

Anonymous

Mar 27, 2026

Rating: 5/5

Easy to wire up

As a beginner, I found this very easy to connect. Just VCC, GND, and Signal. The documentation online is plentiful. It made my final year project much easier to complete.

Anonymous

Mar 26, 2026

Rating: 4/5

Good value but sensitive to distance

Great sensor for the price. You do need to be careful with the gap between the magnet and the sensor; if it's too far, it won't trigger. Once calibrated, it works great for counting revolutions.

Anonymous

Mar 10, 2026

Rating: 4/5

Works well for tachometer

Using this to build a digital tachometer for my RC car. It handles high speeds well without missing pulses. Only wish the cable was a bit longer, but that's a minor issue.

Anonymous

Mar 10, 2026

Rating: 5/5

Solid build quality

The PCB looks clean and the soldering points are solid. The comparator chip included ensures a clean digital signal even in noisy environments. Very satisfied with this purchase.

Anonymous

Mar 08, 2026

Rating: 5/5

Reliable and Fast

I bought five of these for a conveyor belt counter project. They respond quickly and haven't failed yet after two weeks of continuous operation. Highly recommended for industrial prototyping.

Anonymous

Mar 02, 2026

Rating: 5/5

Perfect for Arduino Projects

This module works flawlessly with my Arduino Uno. I used it to measure the RPM of a small DC motor, and the readings were stable and accurate. The LED indicator is very helpful for debugging.

5 FAQ

Q: What is the maximum speed it can measure?

A: The sensor has a response frequency of up to 50kHz. This allows it to accurately measure very high motor speeds, typically sufficient for most hobby and light industrial applications.

Q: Can I use this outdoors?

A: The module itself is not waterproof. If you plan to use it outdoors, please enclose it in a weatherproof housing to protect the electronics from moisture and dust.

Q: Is the output normally open or normally closed?

A: The 3144 Hall switch typically pulls the output low when a magnetic south pole is detected. It acts as an open-collector output, so you may need a pull-up resistor depending on your microcontroller setup.

Q: Can this work with a 5V Raspberry Pi GPIO?

A: Yes, the module operates between 3.3V and 24V. It is fully compatible with 5V Raspberry Pi GPIO pins. Just ensure you connect the grounds together.

Q: Does this module come with a magnet?

A: No, this package includes only the sensor module. You will need to provide your own magnet for detection.

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