Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | 3144 |
| Output Type | Digital Switch |
| Operating Voltage | 4.5V - 24V DC |
| Operating Current | Max 25mA |
| Output Current | 25mA Max |
| Operating Temperature | -40°C to +85°C |
| Pin Configuration | 3-Pin (VCC, GND, OUT) |
| Sensing Range | Up to 10mm (depending on magnet) |
| Package Type | TO-92 with PCB Module |
| Application | Motor Speed, RPM Counting, Position Sensing |
Anonymous
Mar 26, 2026
Rating: 5/5
Reliable speed sensing
I installed two of these on my smart car chassis to monitor wheel speed. They are responsive and haven't failed even after weeks of testing. Highly recommend for hobbyist robotics.
Anonymous
Mar 23, 2026
Rating: 4/5
Stable performance
Used these in a classroom setting for student projects. They are durable and consistent. The only minor issue is that the LED indicator is quite bright at night, but that's trivial.
Anonymous
Mar 22, 2026
Rating: 5/5
Perfect for Arduino Projects
This 3144 module worked flawlessly with my Arduino Uno. I used it to measure the RPM of a small DC motor, and the digital output was clean and easy to read. The documentation included was helpful for wiring.
Anonymous
Mar 13, 2026
Rating: 4/5
Good value, works as expected
Solid sensor for the price. It detects magnets reliably within a reasonable distance. I deducted one star because the soldering points on the PCB were a bit small for thick wires, but otherwise great.
Anonymous
Mar 05, 2026
Rating: 5/5
Great for tachometer builds
Built a custom tachometer for a model engine using this sensor. The response time is excellent, and it handles high-frequency switching without dropping pulses. Very satisfied.
Anonymous
Mar 05, 2026
Rating: 5/5
Easy to use for beginners
As someone new to electronics, I appreciated how simple this module is. Just three pins and it works immediately. The included guide explained the polarity clearly.
Q: What is the maximum switching frequency?
A: The 3144 Hall effect switch typically supports switching frequencies up to several kHz, which is sufficient for most motor speed and RPM applications.
Q: Can this be used directly with a 5V Raspberry Pi GPIO?
A: Yes, the module operates between 4.5V and 24V, so it is fully compatible with 5V Raspberry Pi GPIO pins. Ensure you connect the ground common to both devices.
Q: Is the output active high or active low?
A: The output is active low. When a magnetic south pole is detected near the sensing face, the output pin goes to a low state (GND).
Q: Can this sensor detect north poles?
A: The standard 3144 unipolar switch generally responds to a single magnetic pole (usually South). For detecting both poles, you would need a bipolar latch version, though some variants may vary slightly by manufacturer.
Q: Does this module come with a magnet?
A: No, this package includes only the 3144 sensor module and documentation. You will need to provide your own magnet for operation.
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