SONOFF AirGuard TH 3.6'' LCD Zigbee Temperature And Humidity Sensor | SNZB-02DR2

SONOFF AirGuard TH 3.6'' LCD Zigbee Temperature and Humidity Sensor (SNZB-02DR2)

The SONOFF AirGuard TH (SNZB-02DR2) is a modern Zigbee 3.0 temperature and humidity sensor designed for comprehensive indoor climate monitoring. It distinguishes itself with a large 3.6-inch LCD display that allows you to view real-time environmental data without needing to access your smartphone.

Key Features and Display

The sensor's most notable feature is its high-contrast 3.6-inch LCD screen, which simultaneously displays:​

• Current temperature and relative humidity levels

• 24-hour maximum and minimum values

• Remote sensor data from other connected SONOFF Zigbee sensors

• Dew point and VPD (Vapor Pressure Deficit) calculations for advanced environmental analysis

This makes it ideal if you prefer at-a-glance monitoring without phone dependency, unlike earlier SONOFF models such as the SNZB-02D (2.5-inch display) and SNZB-02P (no display).

Technical Specifications

Smart Home Integration and Automation

The SNZB-02DR2 integrates with various smart home platforms:​​

• eWeLink App: Full compatibility with advanced analytics including historical data tracking (up to 6 months), dew point calculations, and VPD analysis for precise environmental monitoring

• Automation & Scenes: Works with other Zigbee devices like humidifiers, air conditioners, and heating systems to create smart automation routines based on temperature and humidity thresholds

• Amazon Alexa: Supports temperature reading integration (humidity display may vary depending on Alexa's implementation)​

• Home Assistant: Full support through Zigbee2MQTT; currently requires additional scripting for ZHA (Zigbee Home Automation)​

• Not Compatible: Philips Hue, IKEA, and Fritz!Box Zigbee gateways are not supported

​

Remote Sensor Display Capability

A distinctive feature is the ability to display readings from other SONOFF Zigbee sensors directly on the AirGuard TH's screen. This allows you to compare indoor versus outdoor conditions, monitor different rooms, or track pool temperatures without switching between applications.

​

Advantages and Practical Benefits

The sensor excels in providing immediate environmental feedback through its large display, making it suitable for locations where you want continuous visual monitoring, such as living rooms, nurseries, or bedrooms. The customizable reporting frequency allows you to balance between real-time data and battery conservation. The combination of local display with cloud-based analytics in eWeLink creates flexibility for both quick glances and detailed historical analysis.