The 12V Normally Open Shock Sensor Relay Module is a compact, reliable vibration detection device designed to protect industrial equipment, machinery, and valuable assets from impact, tampering, and abnormal movement. When the onboard shock sensor detects vibration or physical disturbance above a set threshold, the relay activates, triggering an alarm, shutting down equipment, or sending a signal to a monitoring system.
The module operates from a 12V DC power supply, making it compatible with common industrial control voltages, security systems, and automotive applications. The normally open (NO) relay output provides a dry contact closure when vibration is detected, allowing direct integration with alarm panels, PLCs, buzzers, lights, and other control devices.
The onboard shock/vibration sensor uses a precision mechanism to detect physical disturbances. When the sensor is triggered, the relay energizes for a configurable period, then automatically resets when vibration ceases. The module includes a built-in delay circuit that prevents false triggering from brief, harmless vibrations and ensures the relay remains active long enough to trigger downstream equipment.
The module features onboard sensitivity adjustment, allowing you to fine-tune the detection threshold for different applications. A potentiometer controls the sensitivity, from highly sensitive (detects even slight vibrations) to less sensitive (requires significant impact). This adjustability makes the module suitable for a wide range of environments, from sensitive laboratory equipment to heavy industrial machinery.
LED indicators provide visual feedback for both power status and relay activation, making it easy to verify operation and troubleshoot connections. The module uses screw terminals for secure wiring of power, sensor input, and relay contacts, and the compact PCB design includes mounting holes for easy installation on equipment enclosures, walls, or control panels.
Whether you are protecting expensive machinery from tampering, monitoring equipment for abnormal vibration, or building a vibration-triggered alarm system, the 12V Shock Sensor Relay Module provides a practical, cost-effective solution. It is suitable for individual engineers, facility managers, and businesses purchasing in bulk for industrial protection applications.
Features
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12V DC operation — Compatible with common industrial and security system voltages
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Normally open relay output — Dry contact closure for alarm panels, PLCs, and control devices
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Onboard shock/vibration sensor — Detects physical disturbances and impact
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Adjustable sensitivity — Potentiometer controls detection threshold for different applications
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Built-in delay circuit — Prevents false triggering and ensures reliable relay activation
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LED indicators — Visual feedback for power status and relay state
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Screw terminals — Secure wiring for power, sensor, and relay connections
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Compact PCB with mounting holes — Easy installation on equipment, walls, and panels
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Operating Voltage | 12V DC |
| 2 | Relay Output | Normally Open (NO) |
| 3 | Sensor Type | Shock / Vibration sensor |
| 4 | Sensitivity Adjustment | Onboard potentiometer |
| 5 | Delay Circuit | Built-in, prevents false triggering |
| 6 | Indication | LED for power and relay status |
| 7 | Terminal Type | Screw terminals |
| 8 | Mounting | PCB with mounting holes |
