A Zigbee 3.0 temperature and humidity sensor (model ZTH101) with built-in LCD display. Reports the current room temperature, relative humidity, and battery state to your hub every few minutes – fully local, no cloud dependency. The LCD on the sensor itself shows the current readings at a glance without needing to open an app.
Native Zigbee 3.0 device. Pairs with Home Assistant (Zigbee2MQTT or ZHA), SmartThings, Hubitat, Philips Hue Bridge, Aqara Hub M2, and any other Zigbee 3.0 coordinator. Recognised as a generic Zigbee temperature / humidity sensor and exposed as standard entities for automations and dashboards.
Practical uses
- Underfloor heating control – feed accurate room temperature into Home Assistant to control your thermostat or smart TRVs without relying on the heating system’s built-in (often inaccurate) sensors.
- Humidity-triggered bathroom extraction – when bathroom humidity rises above 70%, turn on the extractor fan via a smart plug or smart switch.
- Greenhouse / conservatory monitoring – track temperature swings and humidity levels for plants, with alerts if it gets too cold overnight.
- Wine fridge / cellar monitoring – verify the storage conditions remain in the correct band.
- Loft monitoring – catch condensation problems by tracking humidity over time.
- Baby room comfort – ensure the nursery stays within recommended temperature (16-20°C) and humidity (40-60%) ranges.
Accuracy
- Temperature: ±0.3°C accuracy in the 0-50°C range
- Humidity: ±3% RH accuracy in the 20-80% RH range
- Reporting interval: every change of 0.5°C or 3% RH (configurable via Zigbee2MQTT)
Hub compatibility
Standard Zigbee 3.0 device using the Temperature Measurement and Relative Humidity Measurement clusters. Works with:
- Home Assistant (Zigbee2MQTT or ZHA) – fully local, separate entities for temperature, humidity, and battery.
- SmartThings – paired via the Generic Zigbee Temperature/Humidity Sensor driver.
- Hubitat – built-in driver, exposes temperature and humidity for local use.
- Philips Hue Bridge – paired as a third-party device; readings appear in the Hue app where supported.
- Aqara Hub – works as a third-party Zigbee device.
Battery life
Two AAA batteries (included). Typical battery life is 12-18 months when reporting at default intervals. The sensor reports battery percentage to the hub, so you can set up a low-battery notification.
Installation
- Open the battery compartment, insert two AAA batteries.
- Put your Zigbee hub into pairing mode.
- Press the small reset button on the back of the sensor for 5 seconds; the LCD blinks to indicate pairing.
- Once joined to the hub, mount the sensor on a wall using the included adhesive pad or screw, or place on a shelf.
- Rename in your hub app, assign a room.
Placement tip: Avoid mounting directly above radiators, in direct sunlight, or near draughts (windows, doors). These distort readings. Wall position 1.2-1.8m above the floor gives the most representative room readings.
Low power and easy to hide away. Calibration with a mercy thermometer was required for accurate measurements in house
Humidity may be wrong, temp looks ok
Extremely easy to order. Was not in stock when originally wanted to order for signed up to be alerted once back in stock. 3 were ordered and quickly received. Had them up and running in about 5 minutes. Only suggestion would be to include a small piece of double sided tape to secure them to the wall or whichever place works best… Will buy from again and recommend.
Works perfectly in my HomeSeer setup.