ThirdReality Garage Door Tilt Sensor

Quick verdict

Stick it on your garage door and you'll always know if it's open or closed. Dead simple, dirt cheap, and runs locally over Zigbee. It won't open or close the door for you. It just reports state. But that's all you need for a "garage left open" notification automation.

Standout: Cheap Zigbee tilt sensor purpose-built for garage door open/close monitoring.

Last checked: 2026-03-22

Compatibility snapshot

Why it stands out

• simple tilt-based detection that knows if the garage door is open or closed
• easy installation with adhesive on the garage door panel
• very affordable
• fully local Zigbee with no cloud subscription

Reasons to hesitate

• only detects open/closed state and does not control the garage door
• Zigbee range to the garage can be tricky and may need a repeater nearby
• requires a Zigbee coordinator

Best for

• knowing whether your garage door is open or closed from within Home Assistant
• automations that alert you if the garage door is left open at night

Avoid if

• you want to both monitor AND control the garage door, since you'll need a separate opener controller
• your garage is far from your Zigbee mesh with no repeaters in range

Privacy and local-control notes

Pure Zigbee sensor with no cloud dependency. Fully local operation through ZHA or Zigbee2MQTT.

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

Buying reality check

Price notes: Very budget-friendly. One of the cheapest ways to get garage door status into Home Assistant.

Compare side by side: see sensor comparisons →