Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	3.3V - 5V DC
Output Type	Digital (TTL)
Detection Distance	Approx. 15mm
Indicator LED	Yes (Power and Signal)
Mounting Hole Diameter	3.0 mm
PCB Dimensions	32mm x 14mm
Connector Type	3-Pin PH2.0 Header
Switch Type	Normally Open (NO)
Compatible Platforms	Arduino, Raspberry Pi, ESP32
Package Includes	1x Module, 1x Magnet, 4x Standoff Screws

6 reviews

Anonymous

Mar 29, 2026

Rating: 5/5

Exceeded expectations

Very sensitive and accurate. I used it in a model train setup to detect station arrival, and it hasn't missed a beat in weeks of operation.

Anonymous

Mar 27, 2026

Rating: 4/5

Easy to use

Plug and play with standard microcontrollers. The documentation online is helpful. Deducting one star because the solder pads are slightly small.

Anonymous

Mar 24, 2026

Rating: 4/5

Good value, works as expected

Solid build quality. The magnet included is strong enough to trigger the switch reliably from about 1cm away. Only wish the cable was a bit longer.

Anonymous

Mar 19, 2026

Rating: 5/5

Great for smart home sensors

Integrated this with an ESP8266 to monitor my mailbox. Low power consumption and instant response time. Very satisfied with the purchase.

Anonymous

Mar 08, 2026

Rating: 5/5

Reliable and compact

We bought ten of these for our robotics workshop. They integrate seamlessly with Arduino boards and have held up well under student use.

Anonymous

Mar 04, 2026

Rating: 5/5

Perfect for security projects

Used this for a DIY door alarm system. The detection range is consistent and the LED indicator makes debugging very easy. Highly recommended for beginners.

5 FAQ

Q: Does this module work with 3.3V logic levels?

A: Yes, the module operates comfortably within the 3.3V to 5V DC range, making it compatible with both 3.3V and 5V microcontrollers.

Q: Does the package include connecting wires?

A: No, the package includes the module, the magnet, and mounting screws. You will need to solder your own wires or use a compatible jumper cable harness separately.

Q: What is the maximum current the output pin can handle?

A: The digital output pin is designed for signal logic and should not source more than 20mA. It is intended to connect directly to a microcontroller GPIO pin.

Q: Is the magnet polarity important for operation?

A: Yes, reed switches are polarity-sensitive. Typically, one side of the magnet will trigger the switch while the other will not. You may need to flip the magnet if it doesn't activate initially.

Q: Can I use this outdoors?

A: The PCB itself is not waterproof. For outdoor use, we recommend placing the module inside a weatherproof enclosure or applying a conformal coating.

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