Third Reality's Zigbee Motion Sensor is a budget PIR sensor that runs about two years on two AAA batteries, detecting motion up to 20 feet away for basic lighting automations.
Works on integrations
Protocols
Setup guides
Roles it can fill
PIR detects motion only, so it clears on a motionless person; pair it with an mmWave sensor where occupancy must hold. Detects to about 20 feet and runs roughly two years on two standard AAA batteries, which keeps client maintenance simple. Pairs directly with ZHA or zigbee2mqtt, fully local.
Entities in Home Assistant
4 entities via zigbee2mqtt
Primary entities 1 What automations and dashboards use.
| Entity | Type | Device class | Unit |
|---|---|---|---|
| Occupancy | binary_sensor | occupancy | — |
Diagnostics 3 Health and troubleshooting values, hidden from dashboards by default.
| Entity | Type | Device class | Unit |
|---|---|---|---|
| Battery low | binary_sensor | battery | — |
| Battery | sensor | battery | % |
| Voltage | sensor | voltage | mV |
From the zigbee2mqtt device database (zigbee-herdsman-converters
26.104.0):
the entities zigbee2mqtt creates for
3RMS16BZ.
Paired through ZHA instead, the same hardware produces a different set.
Where to buy
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