The KY-025 Magnetic Reed Switch Sensor Module detects magnetic field presence using a sealed internal reed switch. When a magnet comes close, the contacts close and the ky 025 reed switch outputs a LOW signal on the digital pin. It runs on 3.3V to 5V DC and connects directly to Arduino, NodeMCU, or ESP32 without extra components.
The reed switch sensor provides both digital and analog output from the same board. A non-obvious detail is that reed switches have specific pull-in and drop-out field strength thresholds, so placing the magnet too far produces inconsistent results. The ky 025 reed switch module does not detect polarity.
Students and hobbyists use the magnetic reed switch sensor for contact detection projects. StemVolt provides this sensor with trusted quality, ensuring reliable performance and easy usability. Use a digitalRead call on the signal pin in Arduino IDE or MicroPython to get started.
Related Product:
- Checkout The Metal Detector Sensor Module
Features:
- Operating voltage of 3.3V to 5V DC allows direct connection to most microcontroller boards
- Digital output format switches between 0 and 1 giving clean signal for interrupt-based projects
- Model ky025 reed sensor uses a sealed reed switch that handles repeated open and close cycles reliably
Technical specifications:
| Specification | Details |
|---|---|
| Model | KY-025 |
| Output Type | Digital and Analog Output |
| Operating Voltage (VDC) | 3.3V to 5V DC |
| Detecting Range | Magnetic field detection |
| Output Format | Digital Switching Output (0 and 1) |
| Interface | Digital signal output |
Applications:
- Bicycle wheel speed counter uses reed switch sensor to count magnet passes per revolution accurately
- Automatic mailbox alert project uses ky 025 reed switch module to detect when lid opens or closes
- Proximity-based power cut-off circuit uses magnetic field detection to switch off load when cover opens
Package includes:
- 1 x KY-025 Magnetic Reed Switch Sensor Module
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