SW-18015P Vibration Sensor Module - Spring-Type Non-Directional Switch

The SW-18015P functions as a simple normally-open (NO) mechanical switch. When vibration triggers it, the contacts close, completing the circuit. You typically connect one wire to a digital input pin (with a pull-up resistor) and the other to ground. The pin will read HIGH when idle and LOW when vibration is detected.

The sensor is rated for a maximum switching voltage of 12V DC and a maximum current of 50mA. For interfacing with 3.3V or 5V microcontroller systems like Arduino or Raspberry Pi, you should use the microcontroller's logic voltage (3.3V or 5V) and ensure the current draw through the switch is limited, typically by the microcontroller's internal pull-up resistor.

The SW-18015P has a fixed sensitivity determined by its internal spring mass. It is designed to detect general vibrations, impacts, or tilting that provides sufficient force to move the spring. Its sensitivity is not electronically adjustable. For finer sensitivity control, you would need to add signal conditioning (like a comparator) to the output or select a different sensor type, such as a MEMS accelerometer.

With an operating temperature range of -40°C to +80°C, the sensor can withstand a wide range of ambient conditions. However, the module itself is not sealed with a specific IP rating. For outdoor or wet environments, the module must be housed in a protective, sealed enclosure to prevent moisture and dust ingress from affecting the electrical contacts and PCB.