# YoLink Water Leak Sensor 2

*YoLink*

> The YoLink Water Leak Sensor 2 detects the presence or absence of water with a 4.2 ft probe cable and a built-in siren. It suits Alexa users, with native support through the maker's hub. Home Assistant users reach it through an integration (the maker's hub).

- Canonical page: https://smarthomecanon.com/devices/yolink-water-leak-sensor-2
- Last checked: 2026-10-20

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [YoLink](https://smarthomecanon.com/brands/yolink) |
| Category | Leak sensor |
| Status | Current[^1] |
| Type | Leak and level sensor with probe cable and siren[^1] |
| Power | 2 AAA batteries[^1] |
| Location | Indoor only[^1] |
| Key spec | 4.2 ft probe cable, extendable to 10 ft[^1] |
| Radio | LoRa to a YoLink hub[^1] |

## Integration paths

**How the YoLink Water Leak Sensor 2 connects**

| Path | Requires | Local | Features lost |
| --- | --- | --- | --- |
| [Proprietary + hub](https://smarthomecanon.com/protocols/proprietary-gateway) | YoLink Hub[^1] | unknown | unknown |

**Platform support for the YoLink Water Leak Sensor 2**

| Path | Platform | Support | Integration |
| --- | --- | --- | --- |
| Proprietary + hub | [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) | Native[^1] |  |
| Proprietary + hub | [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) | withheld |  |
| Proprietary + hub | [Homey](https://smarthomecanon.com/platforms/homey) | withheld | com.yolink |

## Related pages

- [YoLink water leak and level sensors](https://smarthomecanon.com/lines/yolink-water-leak-sensors) (line)
- [YoLink](https://smarthomecanon.com/brands/yolink) (brand)
- [Proprietary radio with a hub](https://smarthomecanon.com/protocols/proprietary-gateway) (protocol)
- [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) (platform)
- [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) (platform)
- [Homey](https://smarthomecanon.com/platforms/homey) (platform)

## Sources

[^1]: YoLink Water Leak Sensor 2 - YoLink. https://shop.yosmart.com/products/ys7904g (manufacturer, checked 2026-10-20)