SONOFF ZigBee SNZB-02DR2 Temperature and Humidity Sensor, 2-Pack

The SONOFF AirGuard TH SNZB-02DR2 is a smart ZigBee temperature and humidity sensor featuring a large 3.6” LCD display. It provides real-time current conditions, daily highs and lows, and air comfort levels. Boasting laboratory-grade precision (±0.2°C / ±2% RH), modern wireless connectivity, and energy-efficient battery operation, this compact device ensures you always know if your room has a healthy microclimate. The clear, high-contrast 3.6” LCD display shows critical data at a glance, including temperature, humidity, min/max values from the last 24 hours, and a graphical comfort indicator. There's no need to open an app or reach for your phone; information is always readily available. At its core, the device utilizes the professional Sensirion SHT40 sensor, renowned for its industrial and measurement applications. This sensor delivers exceptionally stable and reliable readings, contributing to better sleep conditions, healthier air for children, and protection for plants, food, and wine against excessive moisture. This device ensures accurate measurements for ultimate comfort. With ZigBee 3.0 connectivity, the sensor operates reliably, responds quickly, and consumes minimal energy. When paired with a gateway, you can monitor data via the app, set alerts, and create automations—for example, activating a humidifier when the air is too dry or turning on ventilation when humidity is too high. This smart home system proactively manages your comfort. AirGuard TH records measurements and presents them as easy-to-read graphs, allowing you to track changes over time with minute-by-minute accuracy. Daily, weekly, and multi-month statistics are accessible, along with dew point and VPD information. This practical tool aids in better planning for ventilation, heating, plant watering, and effective prevention of mold and excessive moisture. The sensor seamlessly integrates with popular platforms and hubs like Sonoff, Home Assistant, Zigbee2MQTT, and SmartThings. It also supports voice assistants such as Alexa and Google Home, and the Matter Bridge ecosystem. You can check the temperature using voice commands, view data remotely, and control devices from anywhere, offering complete freedom and flexibility within your chosen ecosystem. Even without a ZigBee hub, Proximity Mode allows direct Bluetooth connection to your smartphone to check current parameters, calibrate the sensor, switch between °C and °F, or export data. It’s an ideal solution for basic monitoring, with the option to expand for automation later. Its slim housing, made from durable PC+ABS, operates on two AAA batteries. The device can be freestanding or wall-mounted, making it suitable for bedrooms, children’s rooms, greenhouses, pantries, basements, storage rooms, or offices. A wide operating range (-20°C to 60°C, 5–95% RH) ensures reliability in diverse conditions, providing comprehensive control over your environment's comfort and safety.