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A magnetic reed-switch door/window sensor designed as a normally open (N/O) contact sensor. When a magnet approaches, the internal glass encapsulated switch closes, enabling detection of door/window positions. Compact and low‑power, operating at 3.3–5 V logic levels. Ideal for alarm circuits, home automation, IoT security systems, Arduino/ESP32/Raspberry Pi integration, and basic proximity sensing. |
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