The clear, high-contrast display shows current temperature and humidity, 24-hour min/max values, a comfort indicator, and battery status. The information is easy to read at a glance, even from a greater distance—without having to open the app.
The Sensirion SHT40 sensor provides stable, reliable measurements with an accuracy of ±0.2 °C and ±2% RH. This helps you better monitor a healthy environment for sleep, children, pets, and sensitive storage.
With ZigBee 3.0, you can easily create automations and alerts when limits are exceeded. If you don’t have a gateway, you can use Bluetooth Proximity mode for quick value checks, calibration, switching °C/°F, or exporting data.
Sonoff AirGuard TH (SNZB-02DR2) is a smart thermometer and hygrometer for households and more demanding use (bedroom, children’s room, office, greenhouse, pantry, or basement). On the large, high-contrast display you can see readings instantly without opening the app, while also storing and evaluating measurements in a compatible smart home system.
Main benefits:
After pairing with a ZigBee gateway, you can set alerts for threshold exceedance and create automations—for example, turning on a humidifier when humidity is low or ventilation when humidity is high. The sensor is also suitable for protecting plants, food, or wine from unsuitable conditions.
