1. Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of your KERUI Wireless Water Sensor. This device is designed to detect water leaks and drips, alerting you with a loud 90dB alarm to prevent potential water damage in areas such as kitchens, bathrooms, and basements. The sensor is available in two versions: an independent Water Alarm and a WIFI Water Alarm that integrates with the Tuya smart app.
Figure 1: KERUI Wireless Water Sensor (Front View)
2. Product Overview
The KERUI Wireless Water Sensor is a compact and easy-to-use device. It features a loud buzzer, an indicator light, and specialized contacts for detecting water. The device is powered by AAA batteries.
Figure 2: Labeled components of the Water Leakage Sensor, showing the buzzer, indicator, drip detection contact, overflow detection contact, battery compartment, and test button.
2.1 Dimensions
Figure 3: The Water Leakage Detector measures 99mm in length, 43mm in width, and 26mm in thickness.
3. Setup
3.1 Battery Installation
The device requires two AAA 1.5V batteries (not included). Follow these steps to install the batteries:
- Use a pry tool or a small screwdriver to gently open the cover of the battery compartment on the back of the device.
- Insert two AAA batteries, ensuring correct polarity (+ and - terminals).
- Close the battery compartment cover and tighten the screws to prevent water ingress.
- Press the "test" button. A loud sound indicates correct installation. If the sound is low, the battery may need replacement.
Figure 4: Battery Installation Guide. Step 1: Open cover. Step 2: Install batteries. Step 3: Tighten screws. Step 4: Test button.
3.2 Placement
The KERUI Wireless Water Sensor is designed for flexible placement without complex installation. Place the detector in any area where water leaks or drips may occur.
- Common locations include bathrooms (near toilets, showers, wash basins), kitchens (near sinks, dishwashers), basements, and utility rooms (near water heaters, washing machines).
- For the Water Alarm model, simply place it on a flat surface.
- For the WIFI Water Alarm model, it can also be installed on a wall using screws or double-sided tape.
- If using an external cable probe (for models that support it), ensure the rubber stopper is inserted into the socket when not using the probe to prevent water ingress into the circuits.
Figure 5: Suggested placement locations for the water sensor.
Figure 6: Wireless and easy placement of the water sensor.
4. Operation
The water sensor operates by detecting water contact with its drip and overflow detection contacts. When water bridges these contacts, the alarm is triggered.
4.1 Leakage Detection and Alarm
When the water level is higher than 1mm and touches the detection probes, the device will emit a loud "didi" sound, reaching approximately 90dB. This alarm will continue to sound as long as water is detected, ensuring you are alerted to potential leaks or drips.
Figure 7: Leaking and Dripping Alarm mechanism.
Figure 8: The 90dB alarm ensures you won't miss any alert.
Video 1: Demonstration of the Water Leakage Detector's independent use, including alarm sound level and water detection.
4.2 Model Specifics
- Water Alarm (Independent Use): This version operates independently and cannot be connected to an alarm system or Wi-Fi. It provides a local audible alert.
- WIFI Water Alarm: This version can connect to 2.4G Wi-Fi networks and be controlled via the Tuya smart app, allowing for remote notifications and control. It does not support 5GHz Wi-Fi.
5. Maintenance
Proper maintenance ensures the longevity and reliable operation of your water sensor.
- Battery Replacement: The device has a standby time of approximately 4-6 months. When the "test" button produces a low sound, it indicates that the batteries need to be replaced. Refer to Section 3.1 for battery installation instructions.
- Environmental Conditions: Temperature and humidity can affect battery life. Always try to keep the device in a dry environment.
- Cleaning: Periodically check the detection contacts for any debris or buildup that might interfere with water detection. Clean with a soft, dry cloth if necessary.
Figure 9: Battery compartment and information on standby time.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Alarm is not sounding when water is detected. | Batteries are dead or incorrectly installed. Detection contacts are dirty or obstructed. | Check battery polarity and replace if necessary. Clean detection contacts. Ensure water level is sufficient to bridge contacts. |
| Alarm sounds low when test button is pressed. | Low battery power. | Replace both AAA batteries. |
| WIFI Water Alarm not connecting to network. | Incorrect Wi-Fi frequency (5GHz instead of 2.4GHz). Incorrect Wi-Fi password. Device too far from router. | Ensure you are connecting to a 2.4GHz Wi-Fi network. Double-check Wi-Fi password. Move device closer to the Wi-Fi router. |
| Alarm continues after water is removed. | Residual water on contacts. | Dry the detection contacts thoroughly. |
7. Specifications
| Feature | Detail |
|---|---|
| Product Name | Water Flood Detector |
| Operating Voltage | DC 3V |
| Battery Model | 2 x AAA batteries (not included) |
| Standby Power Consumption | <2uA |
| Alarm Power Consumption | <70mA |
| Alarm Volume | About 90dB |
| Operating Temperature | -10°C to 40°C (14℉ to 104℉) |
| Operating Humidity | 20%--85% RH (≤95% RH general maximum) |
| Standby Time | 4-6 months (actual time affected by environmental factors and water immersion induction frequency) |
| Product Size | 99mm x 43mm x 26mm |
| Detection Mode | Water sense detection (drip, overflow) |
| Installation Mode | Placed on surface, or wall-mounted with screws/double-sided tape |
| Wireless Protocol (WIFI Model) | IEEE 802.11b/g/n (2.4GHz only) |
| Wireless Range (WIFI Model) | 50m |
| Product Weight/Net Weight | 78g |
| Certification | CE, FCC |
| Smart Home Platform (WIFI Model) | Tuya |
8. User Tips
- Wi-Fi Compatibility: If you have the WIFI Water Alarm model, ensure your router is configured for 2.4GHz Wi-Fi, as the device does not support 5GHz networks.
- Independent Operation: The standard Water Alarm model operates independently and cannot be integrated with existing alarm systems.
- Battery Life: The actual battery life can vary significantly based on environmental factors (temperature, humidity) and how often the alarm is triggered. Regularly test the device using the test button to monitor battery health.
- Probe Usage: If your model includes an external cable probe, remember to insert the rubber stopper into the socket when the probe is not in use to protect internal circuits from water.
9. Warranty and Support
KERUI provides professional service for its products. If your product has any defect within one month of receiving the goods, you are eligible for a free replacement. For any questions or support needs, please contact customer service. We commit to responding within 24 hours.
For further details, you may refer to the official user manual PDF: KERUI Water Detector User Manual (PDF)