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Keep an app-based check at a water-prone point such as beside a sink or appliance. The IH-K665 water-contact sensor links to a compatible Tuya Zigbee gateway. It is for households adding individual sensing points to an existing smart-home setup.
- ✅ Check a difficult-to-see spot — Place a sensor at a suitable point near an appliance or under a sink.
- ✅ Review its reported state — The linked app provides a way to check the sensor after gateway pairing.
- ✅ Add more than one location — Choose a multipack when separate water-prone spots need individual sensing points.
- ✅ Fit into a small space — The low-profile round body can sit where a larger monitoring device would be awkward.
Put a sensing point where water may collect
The sensor's contacts must be positioned where water would reach them. One sensing point does not monitor an entire room, and an app notification depends on correct placement, battery condition, gateway connection and app settings.
A compatible Tuya Zigbee gateway is required and purchased separately. This is not a stand-alone Wi-Fi sensor and does not contain a water shut-off valve. It cannot guarantee detection of every leak or prevent water damage.
Choose a pack of 1, 2, 4 or 8 sensors. Each uses a CR2032 battery; battery inclusion is not confirmed, so plan to provide the required cell. Test the complete setup after pairing and periodically during use.

Pair the selected sensor pack with a compatible Zigbee gateway before relying on app reports.

Check app settings and network connections after pairing; the phone is separate.

Position the contacts where water can reach them rather than treating the unit as whole-room coverage.

An alert depends on water reaching the sensing contacts and a working connected setup.

Choose an accessible location near the point you want to check.

Use individual sensors for separate locations; pack quantity is selected independently.

Different rooms need suitable placement and a test of the complete connected setup.

Keep the contacts positioned for the selected sensing point.

The IH-K665 uses a CR2032 cell; a compatible gateway is a separate requirement.
Technical details
- Model: IH-K665
- Product: Water-contact sensor
- Communication: Zigbee
- Platform: Compatible Tuya setup
- Gateway: Required, not included
- Body size: Approximately 50 × 16 mm
- Operating temperature: 0–55 °C
- Power: CR2032 cell; inclusion not confirmed
- Pack options: 1, 2, 4 or 8 sensors
- Exclusions: Gateway, phone and shut-off valve not included
Choose the pack size for your sensing points and test each one with your compatible gateway.
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