{"product_id":"reed-switch-magnetic-sensor-normally-open-arduino-esp32","title":"Normally Open Reed Switch Magnetic Sensor for Arduino, Raspberry Pi \u0026 ESP32","description":"\u003cp\u003eA \u003cstrong\u003ereed switch magnetic sensor\u003c\/strong\u003e is a simple contact-based proximity sensor that detects the presence of a nearby magnet and changes state for reliable position, door, lid, and limit detection. This \u003cstrong\u003enormally open\u003c\/strong\u003e sensor remains open until a magnetic field brings the internal reed contacts together, making it useful for alarms, home automation, robotics, and DIY prototyping. Use it as a basic digital trigger with \u003cstrong\u003eArduino, Raspberry Pi, or ESP32\u003c\/strong\u003e projects for cabinet monitoring, end-stop sensing, and non-contact movement detection where low-power, passive magnetic switching is preferred.\u003c\/p\u003e","brand":"ShillehTek","offers":[{"title":"Default Title","offer_id":52637502603551,"sku":"AC223","price":1.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0837\/4340\/8415\/files\/normally-open-reed-switches-01.png?v=1783737486","url":"https:\/\/shillehtek.com\/products\/reed-switch-magnetic-sensor-normally-open-arduino-esp32","provider":"ShillehTek","version":"1.0","type":"link"}