Description
Description
The 5V Normally Open Shock Sensor Relay Module is a specialized vibration and impact detection device designed for industrial equipment protection, security systems, and automation applications. Operating on a standard 5V DC supply—compatible with USB power, Arduino, Raspberry Pi, and other microcontroller platforms—this module combines a highly sensitive piezoelectric shock/vibration sensor with a built-in relay that activates when physical impact or excessive vibration is detected.
Unlike continuous monitoring modules, this device features a Normally Open (NO) relay configuration, meaning the relay remains open (inactive) under normal conditions and closes (activates) only when a shock event occurs. This makes it ideal for fail-safe alarm systems, emergency shutdown circuits, and equipment tamper detection. The module includes an adjustable sensitivity potentiometer, allowing you to set the precise impact threshold required for triggering, from light taps to heavy shocks.
The onboard LM393 comparator processes the sensor signal and provides clean, bounce-free triggering. A green LED indicator confirms relay activation, and the module offers both NO and NC output terminals for flexible integration into existing control systems. The sensor element is compact and can be mounted remotely on vibrating machinery, doors, windows, or structural elements.
Whether you need to protect CNC machines from excessive vibration, detect unauthorized access to equipment cabinets, monitor conveyor belt jams, trigger alarms during seismic events, or provide impact detection for industrial robots, the 5V Shock Sensor Relay Module delivers reliable, standalone protection without requiring complex programming or PLC integration.
Key Features
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Normally Open (NO) Default State – Relay remains open (inactive) until shock is detected; ideal for fail-safe alarm and shutdown applications.
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Adjustable Sensitivity – Onboard potentiometer allows precise setting of impact/vibration threshold, from light taps to heavy shocks.
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5V DC Operation – Compatible with USB power, Arduino, Raspberry Pi, and standard 5V power supplies.
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Piezoelectric Shock Sensor – Fast response to physical impacts and vibrations; solid-state design with no moving parts.
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LM393 Comparator IC – Provides stable, noise-immune threshold detection with adjustable hysteresis.
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Built-in SPDT Relay – Controls external devices up to 10A / 250V AC or 10A / 30V DC.
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Dual Output Terminals – Both NO (Normally Open) and NC (Normally Closed) available for flexible wiring.
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Status Indicator LED – Green LED illuminates when relay is activated (shock detected).
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Compact Design – Small footprint for easy installation inside control panels, equipment enclosures, or security housings.
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Latching/Non-Latching Operation – Relay can be configured to latch (stay on after detection) or auto-reset (depending on module version).
Technical Parameters
| Parameter | Value |
|---|---|
| Operating Voltage | 5V DC (±5%) |
| Current Consumption | ≤ 30 mA (standby) / ≤ 70 mA (relay active) |
| Sensor Type | Piezoelectric vibration/shock sensor |
| Sensitivity Adjustment Range | Adjustable via potentiometer (approx. 0.1g to 10g trigger threshold) |
| Relay Output Type | Normally Open (NO) – closes on shock detection |
| Relay Contact Rating | 10A / 250V AC or 10A / 30V DC (resistive load) |
| Output Terminals | 3-pin screw terminal (COM, NO, NC) |
| Response Time | ≤ 10 ms (typical) |
| Operating Temperature | -20°C to +60°C |
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