5V 12V 24V Water Leak Sensor Relay Module Alarm Detector
5V 12V 24V Water Leak Sensor Relay Module Alarm Detector
DIY Water Leak & Level Detection Relay Module — 5V / 12V / 24V
Stay ahead of unwanted flooding and water overflow with this versatile Water Leak & Water Level Sensor Relay Module. Designed for DIY electronics enthusiasts, home automation projects, and industrial setups, this compact relay controller detects moisture and triggers an alarm or connected device instantly — giving you real-time awareness and control over your water management systems.
Key Features
- Multi-Voltage Support: Compatible with 5V, 12V, and 24V DC systems, making it easy to integrate into a wide variety of DIY and professional setups.
- Fail-Safe Relay Design: The relay is engineered to operate in the energized (active) state during normal (dry) conditions — meaning even if the device is damaged, the connected alarm will still trigger for maximum reliability and safety.
- High Sensitivity Detection: At low sensitivity settings, the sensor can detect moisture through wet paper and cloth — not just standing water, ensuring early warning before water accumulates.
- Flexible Relay Output: Features NO (Normally Open), NC (Normally Closed), and COM (Common) terminals, allowing you to configure the module for a wide range of alarm, shutoff, or notification systems.
- Robust Relay Ratings: Rated for 10A at 250V AC, 125V AC, 30V DC, and 28V DC — capable of switching real-world loads like pumps, buzzers, solenoid valves, and more.
- Compact & Easy to Mount: At just 53 × 31 × 19 mm, this module fits neatly into enclosures, panels, or custom project housings.
- Model Number: J132 | Brand: LIHTNE
Technical Specifications
| Specification | Details |
|---|---|
| Working Voltage | 5V / 12V / 24V DC |
| Relay Output | NO / NC / COM |
| Relay Rating | 10A 250V AC | 10A 125V AC | 10A 30V DC | 10A 28V DC |
| Dimensions | 53 × 31 × 19 mm |
| Model | J132 |
| Country of Origin | Made in China |
Ideal Applications
- Basement and crawl space water intrusion detection
- Sump pump control and overflow monitoring
- Aquarium and fish tank level management
- Washing machine and dishwasher leak monitoring
- DIY home automation and Arduino/Raspberry Pi projects
- Industrial water tank level control
Important Notes
⚠️ Fail-Safe Operation: The relay is designed to be energized when no water is detected. This means that even in the event of device damage, the connected alarm will continue to function — providing a reliable, always-on safety net.
⚠️ High Sensitivity: At low sensitivity settings, the module can detect moisture in wet paper or cloth, allowing for ultra-early detection before liquid accumulates.
For guidance on electrical safety when working with relay modules and DIY electronics, visit the U.S. Consumer Product Safety Commission – Electrical Safety Resources.
Frequently Asked Questions
Q: What voltages does the water leak sensor relay module support?
A: This relay module supports 5V, 12V, and 24V DC operating voltages, making it compatible with a wide range of DIY electronics platforms, microcontrollers, and industrial control panels.
Q: What happens if the module is damaged — will my alarm still work?
A: Yes! The relay is specifically engineered for fail-safe operation. It is designed to remain energized (active) when no water is present, so if the module is ever damaged, the connected alarm will still trigger — ensuring continuous protection for your property.
Q: Can this sensor detect moisture on surfaces like wet cloth or paper, or only standing water?
A: At its low sensitivity setting, the module is sensitive enough to detect moisture on wet paper and cloth — not just pooled water. This allows for very early detection before a significant water level builds up.
Q: What type of loads can I connect to the relay output?
A: The relay is rated for 10A at 250V AC, 125V AC, 30V DC, and 28V DC. This means you can connect buzzers, solenoid valves, water pumps, lights, or other alarm devices directly to the relay terminals (NO/NC/COM).