Sonoff AirGuard TH SNZB-02DR2 ZigBee LCD Temperature and Humidity Sensor
ZigBee 3.0, Bluetooth, 3.6" LCD, Sensirion SHT40, -20°C to 60°C
The Sonoff AirGuard TH SNZB-02DR2 is a precise ZigBee temperature and humidity sensor with a 3.6-inch high-contrast LCD display. It offers lab accuracy (±0.2°C / ±2% RH) and enables real-time monitoring of room climate data. Thanks to ZigBee 3.0 connectivity and Bluetooth proximity mode, the sensor can be easily integrated into smart home systems. Ideal for improving room climate and preventing moisture issues.
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Description
The Sonoff AirGuard TH SNZB-02DR2 is a state-of-the-art ZigBee temperature and humidity sensor that helps you monitor the microclimate in your rooms. With its large 3.6-inch high-contrast LCD display, it not only shows the current temperature and humidity but also the min and max values of the last 24 hours as well as a graphical comfort index. Thanks to the precise Sensirion SHT40 sensor, it provides measurements with an accuracy of ±0.2°C and ±2% RH, which is crucial for a healthy indoor climate. The ZigBee 3.0 connectivity allows for easy integration into your smart home system, enabling you to set alarms and create automations to activate a humidifier, for example, when the air is too dry. Additionally, the sensor offers extensive data history and analysis to help you optimize your ventilation and heating control. With its compact design and flexible application, the AirGuard TH is ideal for any room, whether in the bedroom, children's room, or office.
Specifications
| General | |
|---|---|
| Manufacturer | Sonoff |
| Model | SNZB-02DR2 (AirGuard TH) |
| Device Type | Smart Temperature and Humidity Sensor (ZigBee + Bluetooth) |
| Wireless Connectivity | ZigBee 3.0 (IEEE 802.15.4) + Bluetooth (Proximity Mode) |
| Display | 3.6 " high-contrast LCD |
| Measurement Sensor | Sensirion SHT40 |
| Temperature Measurement Accuracy | ±0.2°C |
| Humidity Measurement Accuracy | ±2% RH |
| Temperature Measurement Range | -20°C ~ 60°C |
| Humidity Measurement Range | 5–95% RH (non-condensing) |
| Temperature Units | °C / °F (switchable) |
| Data Logging | Measurement History |
| Additional Analyses in the App | Dew Point, VPD, Comfort Level |
| Notifications | Alerts for exceeding temperature and humidity thresholds |
| Power Supply | 3.0 V DC |
| Battery Type | 2 × AAA / LR03 1.5 V |
| Microcontroller (MCU) | TLSR8656F512ET32 |
| Housing Material | PC + ABS |
| Color | White |
| Weight | 99.3 g (with batteries) |
| Packaging Dimensions | |
| Height | 7.7 mm |
| Width | 10.5 mm |
| Depth | 3.3 mm |