ZigBee LCD Temperature and Humidity Sensor Sonoff AirGuard TH SNZB-02DR2
Sonoff AirGuard TH SNZB-02DR2 is a smart ZigBee temperature and humidity sensor with a large 3.6" LCD display that shows current conditions, daily maximum and minimum values, and air comfort level in real time. It combines laboratory precision (±0.2°C / ±2% RH), modern wireless connectivity, and energy-efficient battery operation in one compact device. With it, you always know if the room has a healthy microclimate—no guessing, no assumptions, no unnecessary complications.
Clear and large 3.6" LCD screen
The clear, high-contrast display is designed so that the most important data is visible from a distance. One glance is enough to check the temperature, humidity, min/max values for the last 24 hours, and a graphical comfort indicator. You don't need to open an app or reach for your phone – the information is always at your fingertips, exactly when you need it.
Precise premium sensor – Sensirion SHT40
At the heart of the device is the professional Sensirion SHT40 sensor, known for its industrial and measurement applications. It provides exceptionally stable and reliable readings, which translates into real benefits: better sleeping conditions, healthier air for children, and protection of plants, food, and wine from excessive moisture. This device measures accurately – because when it comes to comfort, there is no room for chance.
ZigBee 3.0 – smart automation without cables
Thanks to ZigBee 3.0 connectivity, the sensor operates stably, responds quickly, and consumes a minimum of energy. Once paired with the gateway, you can monitor data in the app, set alerts, and create automations – e.g., turning on a humidifier when the air is too dry or ventilation when humidity is excessive. It's a smart home that takes care of your comfort before you even notice a problem.
Data history and analytics
AirGuard TH records measurements and presents them in the form of clear graphs, allowing you to track changes over time – with accuracy down to the minute. Daily, weekly, and multi-month statistics are available, as well as information on dew point and VPD. It is a practical tool that helps you better plan ventilation, heating, or plant watering and effectively prevent mold and excessive moisture.
Works with your smart home system
The sensor integrates seamlessly with popular platforms and hubs: Sonoff, Home Assistant, Zigbee2MQTT, SmartThings, as well as voice assistants such as Alexa and Google Home, and the Matter Bridge environment. You can check the temperature with your voice, view data remotely, and turn on devices from anywhere. This gives you complete freedom and flexibility regardless of your chosen ecosystem.
Proximity mode – use even without a gateway
Don't have a ZigBee hub? No problem. In Proximity mode, you can connect directly to your smartphone via Bluetooth to check current parameters, calibrate the sensor, change °C/°F units, or export data. It's the perfect solution for those who want to start with simple monitoring and only later expand the system with automation.
Compact design and versatile application
The slim housing made of durable PC+ABS, powered by two AAA batteries, and the ability to stand or hang make the AirGuard TH suitable for literally anywhere – in the bedroom, children's room, greenhouse, pantry, basement, warehouse, or office. A wide operating range (-20°C to 60°C, 5–95% RH) ensures reliability in various conditions. It is a small device that gives you great control over the comfort and safety of your environment every day.
Included
- ZigBee LCD Sonoff AirGuard TH SNZB-02DR2 Temperature and Humidity Sensor
- User manual
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