Reed Switch 3-Pin 2.5×14 mm Magnetic Sensor
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Prices updated: 13 Oct 2026
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About this product
A miniature reed switch in a 2.5 × 14 mm glass body that changes state when a magnet approaches. It is used in door and window sensing, position detection and magnetic triggering in DIY and hobby circuits. The listing describes it as a 3-pin reed switch.
Specifications
- Type
- Magnetic reed switch / مفتاح ريد مغناطيسي
- Dimensions
- 2.5 × 14 mm / 2.5 × 14 مم
- Number of pins
- 3 pins / 3 أطراف
Frequently asked questions
How do I wire a 3-pin reed switch?
Identify which pins form the switch contact using a multimeter in continuity mode while a magnet is near the switch. Connect the active pair to your circuit and use a pull-up or pull-down resistor on a microcontroller input.
Can I use it to detect a door opening?
Yes, reed switches are commonly used for door and window sensing. Mount the switch on the frame and the magnet on the moving part, keeping the gap small enough for the magnet to actuate the switch reliably.
