{"product_id":"ky-025-reed-switch-sensor-module-magnetic-induction","title":"KY-025 Reed Switch Sensor Module – Magnetic Induction","description":"\n\u003ch2\u003eKY-025 Reed Switch Sensor Module – Magnetic Induction\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eKY-025 Reed Switch Sensor Module\u003c\/strong\u003e is a versatile magnetic induction module designed for Arduino, Raspberry Pi, and other microcontroller platforms. Featuring a large reed switch element, this module detects the presence of a magnetic field and outputs both a digital and analog signal — making it perfect for DIY electronics projects, automation systems, security triggers, and smart home applications.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Signal Output:\u003c\/strong\u003e Provides both digital (DO) and analog (AO) output for flexible integration with microcontrollers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLarge Reed Switch Element:\u003c\/strong\u003e Offers a wider magnetic sensitivity range compared to standard mini reed switches.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOnboard LED Indicators:\u003c\/strong\u003e Power and signal LEDs give instant visual feedback during testing and deployment.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable Sensitivity:\u003c\/strong\u003e Built-in potentiometer allows fine-tuning of the magnetic field detection threshold.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact PCB Design:\u003c\/strong\u003e Easy to mount and integrate into breadboards or custom enclosures.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Compatibility:\u003c\/strong\u003e Works seamlessly with Arduino UNO, Mega, Nano, Raspberry Pi, ESP8266, ESP32, and more.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Power Consumption:\u003c\/strong\u003e Efficient design suitable for battery-powered projects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModule Type:\u003c\/strong\u003e KY-025 Reed Switch Sensor\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Voltage:\u003c\/strong\u003e 3.3V – 5V DC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Type:\u003c\/strong\u003e Digital (DO) + Analog (AO)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSwitch Type:\u003c\/strong\u003e Large Reed Switch (Normally Open)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOnboard Components:\u003c\/strong\u003e Reed switch, potentiometer, power LED, signal LED, LM393 comparator\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDoor and window open\/close detection\u003c\/li\u003e\n  \u003cli\u003eProximity and position sensing\u003c\/li\u003e\n  \u003cli\u003eContactless switch triggering\u003c\/li\u003e\n  \u003cli\u003eMagnetic field presence detection\u003c\/li\u003e\n  \u003cli\u003eHome automation and smart security systems\u003c\/li\u003e\n  \u003cli\u003eArduino and Raspberry Pi sensor kits\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × KY-025 Reed Switch Sensor Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What voltage does the KY-025 reed switch sensor module operate at?\u003c\/h4\u003e\n\u003cp\u003eA: The KY-025 reed switch sensor module operates at 3.3V to 5V DC, making it fully compatible with both 3.3V boards like Raspberry Pi and ESP32, as well as 5V boards like Arduino UNO and Mega.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the difference between the digital and analog outputs on the KY-025 module?\u003c\/h4\u003e\n\u003cp\u003eA: The digital output (DO) provides a simple HIGH or LOW signal based on whether the magnetic field exceeds the threshold set by the onboard potentiometer. The analog output (AO) provides a variable voltage reading proportional to the magnetic field strength, allowing for more nuanced detection and measurement in your projects.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What type of magnet works best with the KY-025 large reed switch module?\u003c\/h4\u003e\n\u003cp\u003eA: The KY-025 module responds to any standard permanent magnet, such as a neodymium or ferrite magnet. The large reed switch element offers a broader sensitivity area, so even moderate-strength magnets placed within a few centimeters of the switch can reliably trigger the output signal.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is the KY-025 reed switch module compatible with Arduino?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — the KY-025 magnetic induction sensor module is fully compatible with Arduino boards (UNO, Mega, Nano, etc.), as well as Raspberry Pi, ESP8266, ESP32, and virtually any microcontroller that supports 3.3V–5V GPIO pins.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What voltage does the KY-025 reed switch sensor module operate at?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The KY-025 reed switch sensor module operates at 3.3V to 5V DC, making it fully compatible with both 3.3V boards like Raspberry Pi and ESP32, as well as 5V boards like Arduino UNO and Mega.\"}}, {\"@type\": \"Question\", \"name\": \"What is the difference between the digital and analog outputs on the KY-025 module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The digital output (DO) provides a simple HIGH or LOW signal based on whether the magnetic field exceeds the threshold set by the onboard potentiometer. 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