5V/12V Vibration Sensor Relay Module SW-420 Alarm Trigger
5V/12V Vibration Sensor Relay Module SW-420 Alarm Trigger
5V/12V Vibration Sensor Relay Module – 2-in-1 Alarm Trigger with Indicator Light
This compact yet powerful Vibration Sensor Relay Module is the ideal solution for DIY security systems, industrial monitoring setups, and electronics projects that require reliable vibration-triggered switching. Built around the sensitive SW-420 normally closed vibration sensor, this 2-in-1 module can directly drive high-current equipment and trigger alarms with minimal setup. Made in Mainland China.
Key Features
- SW-420 Normally Closed Sensor: Highly sensitive vibration detection for precise, reliable triggering in a wide range of environments.
- Flexible Dual Voltage: Compatible with both 5V and 12V DC power supplies, making it versatile for Arduino, Raspberry Pi, and other common electronics platforms.
- Long Detection Range: The vibration sensor can be positioned remotely — cable lengths up to 10 meters have no impact on detection sensitivity.
- High-Current Relay Output: Directly drives large-load devices rated up to 250V 10A AC or 30V 10A DC — no additional driver circuitry required.
- LED Status Indicator: A built-in green indicator light provides instant visual feedback — light ON means no vibration detected (relay engaged); light OFF when vibration is sensed (relay releases).
- Four Mounting Holes: Easy, secure installation in any enclosure or panel with four positioning holes included.
Specifications
| Power Supply Voltage | 5V / 12V DC |
| Minimum Current | >100mA |
| Relay Load (AC) | 250V 10A |
| Relay Load (DC) | 30V 10A |
| Sensor Type | SW-420 Normally Closed Vibration Sensor |
| Max Sensor Cable Length | 10 meters |
| Mounting Holes | 4 positioning holes |
| Country of Origin | Mainland China |
How It Works
In its default (no-vibration) state, the relay is engaged and the green indicator light is ON — the common terminal connects to the normally open contact. When vibration is detected by the SW-420 sensor, the relay releases, the green light turns OFF, and the common terminal switches to the normally closed contact, triggering your connected alarm or device.
Common Applications
- Vibration-triggered alarm and security systems
- DIY electronics and Arduino/Raspberry Pi projects
- Industrial equipment monitoring
- Anti-theft device activation
- High-voltage or high-current circuit switching
What's in the Box
- 1× Vibration Sensor Relay Module
- 1× Locating Plate
- 2× Cables
Please Note: Colors may vary slightly due to monitor and lighting differences. Allow ±1–10mm variance due to manual measurement.
For general electrical safety guidance on relay and switching components, refer to the U.S. Consumer Product Safety Commission – Electrical Safety Resources.
Frequently Asked Questions
Q: What voltage does this vibration sensor relay module support?
A: This module supports both 5V and 12V DC power supplies, making it compatible with a wide range of microcontrollers and electronics platforms, including Arduino and Raspberry Pi.
Q: How far can the SW-420 vibration sensor be placed from the relay module?
A: The SW-420 vibration sensor can be positioned up to 10 meters away from the relay board with no loss in detection sensitivity, giving you great flexibility in installation placement.
Q: What loads can the relay in this module handle?
A: The onboard relay is rated for 250V AC at 10A or 30V DC at 10A, allowing it to directly switch high-current appliances, alarms, motors, and other large-load devices without additional circuitry.
Q: What does the green indicator light indicate on this module?
A: When the green LED is ON, no vibration is being detected and the relay is engaged. When vibration is sensed, the relay releases and the green LED turns OFF, signaling that the trigger circuit has been activated.