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Sonoff
Sonoff SNZB-05P Zigbee Water Leak Sensor
- Zigbee2MQTT / ZHA
- Local control
- Zigbee
Prices verified November 2026
See more sensors picks on our Amazon storefront →Our verdict
A cheap, small Zigbee leak sensor for under the sink, behind the washing machine or by the boiler. It has no siren of its own, so the alert comes from Home Assistant. Place it flat on the floor, as it only reads water touching the contacts underneath.
What can Home Assistant control on the Sonoff SNZB-05P Zigbee Water Leak Sensor?
| Control | Type | What it does |
|---|---|---|
| Water leak | Binary sensor | On when water bridges the contacts |
| Battery | Sensor (read-only) | Battery percentage |
Pairs directly with Zigbee2MQTT or ZHA through any Zigbee coordinator, with no Sonoff hub or eWeLink account needed. It exposes a water_leak binary sensor, battery percentage and battery_low. Fully local once paired.
How does the Sonoff SNZB-05P Zigbee Water Leak Sensor compare?
| Product | From | Protocol | Local control | Integration |
|---|---|---|---|---|
| Sonoff SNZB-05P Zigbee Water Leak Sensor (this product) | £18.78 | Zigbee | Yes | Zigbee2MQTT / ZHA |
| Aico Ei3016 (Mains Optical Smoke Alarm) | £53.89 | Wi-Fi | Cloud | HACS |
| Airthings View Plus | £259 | Wi-Fi, Bluetooth | Cloud | Native |
| Apollo Automation MSR-2 mmWave Multisensor | £38.7 | Wi-Fi, Bluetooth | Yes | Native |
Frequently asked questions
- Does the Sonoff SNZB-05P Zigbee Water Leak Sensor work with Home Assistant locally?
- Yes. The Sonoff SNZB-05P Zigbee Water Leak Sensor is controlled locally in Home Assistant through Zigbee2MQTT or ZHA, so it keeps working if your internet connection or the Sonoff cloud goes down. Control and state updates stay on your own network.
- Which protocol does the Sonoff SNZB-05P Zigbee Water Leak Sensor use, and do I need a hub?
- The Sonoff SNZB-05P Zigbee Water Leak Sensor uses Zigbee. To pair it with Home Assistant you need a Zigbee coordinator (for example a SkyConnect/ZBT-1 or Sonoff dongle) attached to your Home Assistant host. Sonoff's own hub is not required when you integrate through Zigbee2MQTT or ZHA.
- How much does the Sonoff SNZB-05P Zigbee Water Leak Sensor cost in the UK?
- The lowest price we have listed for the Sonoff SNZB-05P Zigbee Water Leak Sensor is £18.78 at Amazon UK. Prices were last checked in November 2026 and change often, so confirm on the retailer's page before buying.
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Sonoff
Sonoff SNZB-05P Zigbee Water Leak Sensor
£18.78 at Amazon UK