KY-025 Reed Switch Sensor Module – Magnetic Induction
KY-025 Reed Switch Sensor Module – Magnetic Induction
KY-025 Reed Switch Sensor Module – Magnetic Induction
The KY-025 Reed Switch Sensor Module 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.
Key Features
- Dual Signal Output: Provides both digital (DO) and analog (AO) output for flexible integration with microcontrollers.
- Large Reed Switch Element: Offers a wider magnetic sensitivity range compared to standard mini reed switches.
- Onboard LED Indicators: Power and signal LEDs give instant visual feedback during testing and deployment.
- Adjustable Sensitivity: Built-in potentiometer allows fine-tuning of the magnetic field detection threshold.
- Compact PCB Design: Easy to mount and integrate into breadboards or custom enclosures.
- Wide Compatibility: Works seamlessly with Arduino UNO, Mega, Nano, Raspberry Pi, ESP8266, ESP32, and more.
- Low Power Consumption: Efficient design suitable for battery-powered projects.
Specifications
- Module Type: KY-025 Reed Switch Sensor
- Operating Voltage: 3.3V – 5V DC
- Output Type: Digital (DO) + Analog (AO)
- Switch Type: Large Reed Switch (Normally Open)
- Onboard Components: Reed switch, potentiometer, power LED, signal LED, LM393 comparator
- Origin: Made in Mainland China
Common Applications
- Door and window open/close detection
- Proximity and position sensing
- Contactless switch triggering
- Magnetic field presence detection
- Home automation and smart security systems
- Arduino and Raspberry Pi sensor kits
What's in the Box?
- 1 × KY-025 Reed Switch Sensor Module
Learn more: OSHA guidance on hand and power tools
Frequently Asked Questions
Q: What voltage does the KY-025 reed switch sensor module operate at?
A: 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.
Q: What is the difference between the digital and analog outputs on the KY-025 module?
A: 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.
Q: What type of magnet works best with the KY-025 large reed switch module?
A: 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.
Q: Is the KY-025 reed switch module compatible with Arduino?
A: 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.
Production & Packaging Notice
To 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.