Third Reality's Zigbee Water Leak Sensor fires the instant water bridges its contacts, sounding a local buzzer and reporting the leak to Home Assistant over Zigbee.
Entities in Home Assistant
6 entities via zigbee2mqtt
Primary entities 4 What automations and dashboards use.
| Entity | Type | Device class | Unit |
|---|---|---|---|
| Water leak | binary_sensor | moisture | — |
| Water leak buzzer alarm mode | number | — | min |
| Switch (main) | switch | — | — |
| Water leak buzzer | switch | — | — |
Diagnostics 2 Health and troubleshooting values, hidden from dashboards by default.
| Entity | Type | Device class | Unit |
|---|---|---|---|
| Battery low | binary_sensor | battery | — |
| Battery | sensor | battery | % |
From the zigbee2mqtt device database (zigbee-herdsman-converters
26.116.0):
the entities zigbee2mqtt creates for
3RWS18BZ.
Paired through ZHA instead, the same hardware produces a different set.
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Recipes using this device
Leak Auto Shutoff
Installs a Home Assistant automation that closes your water shutoff valve the instant a leak sensor goes wet, so a burst hose or a failed valve stops flooding within seconds. Add a smart plug to cut the appliance, a siren, and a speaker.
Water Leak Alert
Installs a Home Assistant automation that watches every water leak sensor you select and alerts you the moment one goes wet, naming the spot so you know where to look. Add a speaker and the same warning is announced out loud.