ThirdReality Temperature Sensor Lite

Quick verdict

If you just need temperature and humidity data feeding into Home Assistant with no display, this does the job on easy-to-stock AAA batteries, with the same local Zigbee reliability as the LCD version. It is no longer the bargain it once was, though - sensors with displays now list for less - so buy it for the simplicity, not the savings.

Standout: Display-free Zigbee temperature and humidity sensor on AAA batteries.

Notes last checked Mar 22, 2026.

Compatibility snapshot

Why it stands out

• rock-bottom price for a Zigbee temp and humidity sensor
• tiny and unobtrusive, easy to place anywhere
• reliable readings for basic climate monitoring
• fully local Zigbee operation

Reasons to hesitate

• no LCD display, so you can only see readings in Home Assistant
• requires a Zigbee coordinator
• fewer features than the full-size version

Best for

• deploying cheap temperature sensors in every room for whole-home climate tracking
• automations that just need a temperature reading without a display

Avoid if

• you want to glance at the sensor and see the current reading
• you have no Zigbee coordinator

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: About $20 (verified 2026-08-28) - no longer notably cheaper than sensors with displays; the SONOFF SNZB-02D lists for less. Its draw is AAA batteries and simplicity, not price.

Compare side by side: see sensor comparisons →

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