Kemo Water Detector 9-12 V DC

Kemo M158 Water Detector 9-12 V DC

The Kemo M158 Water Detector is a compact, high‑performance module designed to detect the presence of water or other conductive liquids within a wide voltage range of 9 V to 12 V DC. Its primary function is to serve as an early warning system for potential flooding, leaks, or accidental water contact in electrical installations.

Key Features

• Voltage Compatibility: Operates seamlessly on any supply between 9 V and 12 V DC, making it ideal for low‑voltage applications such as home automation, industrial control panels, or marine equipment.
• Integrated Relay Output: The module includes a built‑in relay capable of switching up to 25 V/3 A. This allows direct control of sirens, pumps, cut‑off relays, or other high‑current devices without the need for an external driver.
• Low Power Consumption: With a current draw of less than 10 mA, the detector is energy efficient and suitable for battery‑powered systems or long‑term monitoring setups.
• LED Status Indicators: Two LEDs provide instant visual feedback: one indicates power status while the other signals water detection. This simplifies troubleshooting and ensures operators can quickly assess system health.
• Compact Footprint: The module’s small size (typical dimensions around 30 mm × 20 mm) allows easy integration into tight spaces or as a plug‑in component within larger control boards.

Technical Specifications

Installation and Wiring

The Kemo M158 is designed for straightforward installation. Connect the supply terminals to a 9–12 V DC source, ensuring correct polarity. The relay contacts are available on the module’s output side; connect them directly to the load (e.g., siren coil, pump motor, or another control relay). The built‑in LEDs can be observed without any additional wiring.

For cable‑mounted applications, the module can be soldered onto a PCB or wired using terminal blocks. When integrating into a larger system, the relay output can trigger secondary logic circuits or alarm panels.

Applications

• Flood Prevention: Monitor basements, crawl spaces, or water‑prone areas to activate alarms or shut down pumps before damage occurs.
• Industrial Process Control: Detect accidental liquid spills in control cabinets and trigger safety interlocks.
• Marine Electronics: Protect critical equipment on boats by sensing water ingress and activating bilge pumps.
• Home Automation: Integrate with smart home hubs to send notifications or activate automated responses when moisture is detected.

Operating Principle

The detector contains two conductive electrodes positioned within a sealed housing. When water or another conductive liquid bridges the gap between these electrodes, an electrical path is established. This triggers the internal circuitry to close the relay contacts and illuminate the detection LED. Once the liquid is removed, the circuit opens, deactivating the relay and turning off the LED.

Maintenance and Reliability

The Kemo M158 requires no routine maintenance once installed. Its sealed design protects against dust, humidity, and mechanical shock. For long‑term reliability, ensure that the supply voltage remains within the specified range and that the relay contacts are not subjected to continuous high‑current operation beyond their rating.

Compatibility with Other Kemo Modules

This water detector can be paired with other Kemo safety devices such as fire detectors, gas sensors, or motion alarms. By combining outputs on a single control panel, users can create comprehensive environmental monitoring systems that respond to multiple hazards simultaneously.

Conclusion

The Kemo M158 Water Detector 9-12 V DC offers a reliable, low‑power solution for detecting water or conductive liquids in a variety of settings. Its integrated relay, clear LED indicators, and broad voltage compatibility make it an excellent choice for both simple alarm setups and complex industrial safety networks.