Price from
27.99 GBP
27.99 GBP
Capteur de pluie
Kemo M152 12V Rain Detector Sensor Relay Module, Pre-Assembled. This pre-assembled rain detector sensor module works with a voltage of 12V/DC. It is designed to detect the presence of water and trigger an alarm or other actions accordingly
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Overview
The Capteur de pluie, also known as a rain or water detection module, is an essential component for automated weather‑responsive systems. Designed to detect the presence of liquid on its surface, it delivers a reliable electrical signal that can trigger relays, alarms, irrigation controls, or other protective mechanisms. The device typically operates at 12 V DC and incorporates a heated sensing element to ensure accurate performance even in cold conditions.
Key Functionalities
- Water Detection: A simple yet robust contact‑dry principle allows the sensor to detect any liquid that bridges its internal electrodes.
- Heated Element: The integrated heating circuit keeps the sensing surface above freezing, preventing false triggers caused by ice or frost.
- Relay Output: An on‑board relay provides a low‑current switching capability, enabling direct control of high‑power devices such as pumps, lights, or motorized shades.
- LED Indicator: A status LED illuminates when water is detected, offering immediate visual confirmation during installation and maintenance.
- Waterproof Construction: The sensor’s electronics are sealed within a robust housing that resists moisture ingress, ensuring long‑term reliability in outdoor environments.
Electrical Characteristics
| Parameter | Specification |
|---|---|
| Operating Voltage | 12 V DC (typical) |
| Input Current | ≤ 50 mA |
| Relay Coil Current | ≈ 70 mA at 12 V |
| Output Voltage | 0 V (dry) / 12 V (wet) |
| Temperature Range | -40 °C to +85 °C (with heating) |
| Waterproof Rating | IP65 or higher |
Typical Applications
- Irrigation Systems: Automatically shut off water pumps when rain is detected to conserve resources.
- Automated Shades & Blinds: Prevent damage by retracting motorized shades during precipitation.
- Roof Ventilation: Trigger ventilation fans or dampers in response to wet conditions.
- Security Systems: Detect water leaks or flooding and activate alarms or notifications.
- Weather Stations: Provide real‑time rain status for data logging and forecasting models.
Installation Guidelines
- Mounting Position: Place the sensor on a sloped surface where water naturally accumulates, such as roof edges or gutter extensions.
- Orientation: Ensure the sensing electrodes face downward to maximize contact with falling droplets.
- Cabling: Use shielded 12 V DC cables rated for outdoor use; secure connections with waterproof connectors.
- Relay Wiring: Connect the relay contacts to the load circuit, observing correct polarity and ensuring isolation from high‑voltage sections.
- Testing: After installation, apply water to the sensor surface and verify LED illumination and relay activation before finalizing the setup.
Maintenance & Troubleshooting
- Cleaning: Gently wipe the sensing area with a dry cloth; avoid abrasive materials that could damage electrodes.
- Inspection: Periodically check for corrosion or debris buildup, especially in humid climates.
- Functional Test: Use a multimeter to confirm correct voltage levels at the input and output terminals during both dry and wet conditions.
- Relay Check: Verify that the relay contacts open and close smoothly; replace if contact resistance increases or if mechanical wear is observed.
Design Features That Enhance Reliability
The sensor’s architecture incorporates several thoughtful design choices:
- Integrated Heating Circuit: Eliminates the need for external heating modules, simplifying installation and reducing power consumption.
- Compact Footprint: The small form factor allows integration into tight spaces without compromising performance.
- Modular Relay: Enables direct control of high‑current loads without requiring additional driver circuits.
- LED Status Indicator: Provides instant visual feedback, reducing troubleshooting time during field deployments.
Compatibility with Automation Platforms
The sensor outputs a simple 0 V/12 V signal that can be interfaced with a wide range of microcontrollers and home‑automation hubs. Common integration points include:
- Arduino, ESP32, or Raspberry Pi GPIO pins (with appropriate voltage level shifting).
- Commercial weather stations or irrigation controllers that accept relay inputs.
- Smart home systems such as Home Assistant, OpenHAB, or Domoticz via relay modules.
Conclusion
The Capteur de pluie is a versatile, reliable component for any system that requires accurate detection of precipitation. Its heated sensing element, built‑in relay, and waterproof construction make it suitable for harsh outdoor environments. Whether you’re designing an automated irrigation setup, protecting delicate equipment from water damage, or building a comprehensive weather monitoring station, this rain sensor delivers consistent performance with minimal maintenance.
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Category
This product is cataloged in our store in these categories
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- Sensors for cars |
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International
Find this product in one of our international stores
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 26.99 EUR  36.34 EUR  23.21 EUR  25.90 EUR  36.87 EUR |
| Colors
Predominant colors of the product |
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| Identifiers | |
| Brand | Kemo Electronic |
| MPN | Kemo Electronic M152 |
| ID | 20578315 |
| Dimensions / Weight | |
| Key Features | |
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