ThirdReality Motion Sensor

Quick verdict

If you want fast, low-cost motion triggers for lighting and hallway automations, the ThirdReality Motion Sensor is a practical Zigbee choice. It is tuned for movement detection (not seated presence), but response is solid and integration with Home Assistant is straightforward.

Standout: Budget Zigbee PIR sensor with dependable trigger speed for lighting automations.

Last checked: 2026-05-31

Compatibility snapshot

Why it stands out

• very affordable PIR motion sensor
• compact design fits in tight spaces
• good Zigbee compatibility with ZHA and Zigbee2MQTT
• decent battery life

Reasons to hesitate

• PIR has the usual blind spots and cooldown period
• no illuminance sensor included
• requires a Zigbee coordinator

Best for

• budget motion-activated lighting automations
• adding occupancy awareness to rooms without spending a lot

Avoid if

• you need mmWave-level presence detection for stationary occupancy
• you want a combined motion + temperature + lux sensor

Privacy and local-control notes

The sensor uses local Zigbee communication and can run fully offline through your own coordinator. Motion events remain in your local automation stack when used with Home Assistant.

Home Assistant support: supported · integration path: ZHA / Zigbee2MQTT.

Buying reality check

Price notes: Typically among the most affordable Zigbee motion options, making room-by-room coverage realistic on a small budget.

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