1. Product Overview
The Xiaomi Water Leak Sensor 2 is a smart water immersion detector designed to provide early warning of water leaks and flooding. It features Bluetooth 5.2 connectivity, allowing it to integrate with the Mi Home APP for remote monitoring, sound and light alarms, and smart device linkage. Its IP67 dustproof and waterproof rating ensures reliable operation in various environments.
2. Specifications
| Feature | Description |
|---|---|
| Product Model | SJWSO2LM |
| CMIIT ID | 25J44B33A046 |
| Wireless Connection | Bluetooth 5.2 |
| Battery Specification | CR2450 |
| Working Temperature | 0 ℃ ~ 55 ℃ |
| Product Size | Φ 55 x 19.5mm |
| Protection Level | IP67 (Dustproof and Waterproof) |
| Execution Standard | GB 4943.1-2022 |
| Power Source | Battery (Other) |
| Battery Included | Yes |
| Inbox Adaptor | No |
| State of Assembly | Ready-to-Go |
| Origin | Mainland China |
2.1 Key Features
- Multi-scenario Water Leakage Detection: Double protection against water immersion and splashing.
- IP67 Dustproof and Waterproof: Fearless of dusty and humid environments.
- Multiple Alarm Methods: Sound and light alarm, Mi Home APP smart alerts, and smart device alerts.
- Early Detection: 0.5mm probe height from the ground for prompt alerts.
- Long Battery Life: Approximately 3 years with a CR2450 button battery.
- Smart Linkage: Supports Xiaomi Pulse Smart Link for connectivity with a wide range of smart home devices.
- Durable Design: Unibody design, corrosion-resistant metal probe with nickel plating, and UV-resistant material.
3. Setup and Installation
3.1 Important Note on Version Compatibility
The Xiaomi Water Leak Sensor 2 is a Chinese version. When connecting to the Mi Home APP, you must change the region setting to "Chinese Mainland" within the app. It is NOT compatible with the Global Version of the Mi Home APP if the region is set to other countries.
3.2 Mi Home APP Region Change
To ensure proper functionality with the Mi Home APP:
- Open the Mi Home APP.
- Tap "Profile" at the bottom right.
- Tap "Additional settings".
- Tap "Region".
- Select "Chinese mainland".
3.3 Device Pairing and Configuration
The sensor is 'Ready-to-Go' out of the box. For smart features, it requires a Bluetooth Mesh gateway.
- Ensure your Mi Home APP region is set to "Chinese mainland" as described above.
- Open the Mi Home APP and log in to your account.
- Tap the "+" icon in the upper right corner of the app's homepage.
- Select "Add device" and choose "Xiaomi Water Leak Detector 2" from the list.
- Follow the on-screen instructions in the app to complete the pairing process.
Note: Devices with built-in Bluetooth mesh gateway functionality include Xiaomi smart home panel, Xiaomi central gateway, Xiaomi smart screen Max, Pro/8, and Xiaomi Smart Home Screen 10, Xiaomi Smart Home Screen Mini, Xiaomi TV, and Redmi TV. You can view your Bluetooth Mesh gateway devices in the Mi Home app by navigating to My -> Central and Gateway -> Upper Right Corner -> clicking on the blue text "Bluetooth Mesh Gateway Devices".
3.4 Placement
Place the sensor in areas prone to water leaks. The 0.5mm probe height ensures early detection. Recommended locations include:
- Under the kitchen sink
- Next to washing machines or dishwashers
- Near window sills prone to water ingress
- Bathroom floors
- Near water inlets/outlets of sweepers or other appliances
4. Operating Instructions
The Xiaomi Water Leak Sensor 2 operates by detecting water immersion or splashing on its surface. When water reaches the probes, it triggers an alarm.
4.1 Alarm Methods
- Sound and Light Alarm: The device features a built-in buzzer and an indicator light that activates upon detecting water. This helps in quickly locating the device and the source of the leak. Local alarms can also be triggered offline.
- Mi Home APP Smart Alerts: When connected to a Bluetooth Mesh gateway and the Mi Home APP, the sensor will send real-time alerts to your smartphone, allowing for remote monitoring and control of risk dynamics.
- Smart Device Alerts: The sensor can be linked with other Xiaomi smart devices (e.g., smart wall sockets, gateways) to trigger automated actions, such as cutting off power to appliances in case of a leak.
4.2 Smart Linkage with Xiaomi Devices
The sensor supports Xiaomi's surge chip for seamless connectivity with a wide range of smart home devices. You can customize your own personalized smart home automation scenarios through the Mi Home APP. For example, if a leak is detected near a washing machine, a smart wall socket connected to the washing machine can automatically cut off its power supply.
5. Maintenance
5.1 Battery Replacement
The sensor uses a CR2450 button battery, which provides an estimated 3-year battery life under normal usage (device reporting information every 15 minutes, experiencing two water splashes or submersion alarms per month). Battery life may vary depending on actual usage conditions.
To replace the battery:
- Twist the rear battery cover counter-clockwise to open it.
- Remove the old battery and place the new CR2450 battery into the compartment, ensuring correct polarity.
- Align the battery cover with the sensor body and twist clockwise to tighten it until secure.
5.2 Cleaning
Wipe the sensor with a soft, dry cloth. Do not use abrasive cleaners or immerse the entire device in water (though it is IP67 rated, prolonged submersion is not recommended for cleaning).
6. Troubleshooting and FAQ
6.1 Common Questions
- Q: What is the difference between water spray alarm and maximum alarm?
- A: The water spray alarm is triggered when water covers the top two probes and completes the circuit. The maximum alarm is triggered when water reaches 0.5mm, indicating a more significant immersion.
- Q: How do I set a continuous sound and light alarm when water is detected?
- A: This setting can be configured within the Mi Home APP under the device's settings.
- Q: Does the sensor need to be connected to a gateway?
- A: For Mi Home APP alerts and smart device linkage, a Bluetooth Mesh gateway is required. However, the sensor can still trigger local sound and light alarms even when offline or not connected to a gateway.
- Q: What smart devices can be linked with the sensor?
- A: The sensor supports linkage with various Xiaomi smart devices that have Bluetooth Mesh gateway functionality, including Xiaomi Smart Home Panel, Xiaomi Central Gateway, Xiaomi Smart Screen Max, Xiaomi Smart Home Screen Pro/8, Xiaomi Smart Home Screen 10, Xiaomi Smart Home Screen Mini, Xiaomi TV, and Redmi TV.
- Q: Can the sensor trigger alarms when offline?
- A: Yes, the sensor can trigger local sound and light alarms even when offline.
- Q: What is the probe height?
- A: The probe height from the ground is 0.5mm, allowing for early detection of water.
7. User Tips
- Region Setting is Crucial: Always ensure your Mi Home APP is set to "Chinese mainland" for this Chinese version of the sensor to function correctly.
- Gateway for Smart Features: While the sensor provides local alarms independently, a Bluetooth Mesh gateway is essential for receiving remote notifications and enabling smart home automation.
- Strategic Placement: Place the sensor in low-lying areas where water is most likely to accumulate first during a leak.
- Regular Checks: Periodically check the sensor's battery status via the Mi Home APP to ensure continuous protection.
8. Warranty and Support
For warranty information and technical support, please refer to the official Xiaomi website or contact Xiaomi customer service. Support is also available through the Mi Home APP's help section.
