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Magnetic contact switch (door sensor)
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$4.88
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A magnetic reed switch encased in an ABS plastic shell, commonly used to detect when a door, window, or drawer is opened. The switch half contains a normally...
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A magnetic reed switch encased in an ABS plastic shell, commonly used to detect when a door, window, or drawer is opened. The switch half contains a normally-open reed contact, and the other half is a magnet. When the magnet is within 13 mm (0.5"), the reed switch closes, completing the circuit.
Key Features
- Normally Open – Closes when the magnet is within 13 mm
- ABS Plastic Housing – Durable enclosure for both halves
- Mounting Tabs – Screw holes for secure installation
- Two-Wire Connection – Simple integration with any microcontroller or alarm system
Ideal For
- Door and window open/close detection
- Drawer and cabinet monitoring
- Security and alarm systems
- Home automation triggers
Tip: Double-sided foam tape from a hardware store works well for mounting without screws.
Package Contents
- 1× Reed switch half (with wires)
- 1× Magnet half
- Mounting screws
Jargon buster
Plain-language definitions for the technical terms used above.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
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