Sonoff SNZB-02DR2 ZigBee Temperature and Humidity Sensor LCD AirGuard TH

ZigBee Temperature and Humidity Sensor LCD Sonoff AirGuard TH SNZB-02DR2

Sonoff AirGuard TH SNZB-02DR2 is an intelligent ZigBee temperature and humidity sensor with a large 3.6” LCD display that shows real-time conditions, daily maximum and minimum, and air comfort level. 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 whether the room has a healthy microclimate – without guessing, without assumptions, without unnecessary complications.

Readable and large 3.6” LCD screen

The clear, high-contrast display has been designed so that the most important data is visible from a distance. A quick glance is enough to check the temperature, humidity, min/max values from the last 24 hours, and a graphic comfort indicator. You don't need to open an app or reach for your phone – the information is always at hand, exactly when you need it.

Precise premium-class sensor – Sensirion SHT40

At the heart of the device is the professional Sensirion SHT40 sensor, known for industrial and measurement applications. It provides exceptionally stable and reliable readings, which translates into real benefits: better sleep conditions, healthier air for children, protection of plants, food, or wine from excessive moisture. This is equipment that measures accurately – because in comfort, there is no room for chance.

ZigBee 3.0 – smart automation without wires

Thanks to ZigBee 3.0 connectivity, the sensor operates stably, responds quickly, and consumes minimal energy. After pairing with a gateway, you can monitor data in the app, set alerts, and create automations – for example, turning on a humidifier when the air is too dry or activating ventilation when humidity is too high. It’s a smart home that takes care of your comfort before you even notice a problem.

History of data 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 about the dew point or VPD. This practical tool helps you better plan ventilation, heating, or plant irrigation and effectively prevents mold and excessive moisture.

It works with your smart home system.

The sensor integrates seamlessly with popular platforms and hubs: Sonoff, Home Assistant, Zigbee2MQTT, SmartThings, as well as with voice assistants such as Alexa or Google Home, and the Matter Bridge environment. You can check the temperature by voice, view data remotely, and turn on devices from anywhere. It offers complete freedom and flexibility regardless of the 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 units °C/°F, or export data. This is the perfect solution for those who want to start with simple monitoring and 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 option to stand or hang make the AirGuard TH fit literally anywhere – in the bedroom, children's room, greenhouse, pantry, basement, storage, or office. A wide operating range (-20°C to 60°C, 5–95% RH) ensures reliability in various conditions. This small device provides great control over the comfort and safety of your environment every day.

In the set

• ZigBee Temperature and Humidity Sensor LCD Sonoff AirGuard TH SNZB-02DR2
• User manual