The SONOFF SNZB-02M AirGuard TH Pressure is a compact smart environmental sensor that monitors temperature, relative humidity, and air pressure. Based on the measured data , the app also calculates the dew point and VPD, providing a more comprehensive overview of indoor conditions.

The sensor uses Zigbee 3.0, which ensures low power consumption and reliable connectivity with compatible Zigbee gateways. You can also use the measured data for smart automation, such as automatically turning on a fan, dehumidifier, heater, or other compatible devices.

The SNZB-02M allows you to set the desired range for temperature, humidity, and air pressure. When a specific value exceeds the set limit, the user can receive an alert via the app.

High-precision sensors enable temperature measurement with an accuracy of ±0.2 °C, relative humidity with an accuracy of ±2% RH, and air pressure with an accuracy of ±0.1 hPa.

Power is supplied by a CR2477 battery, which, according to the manufacturer, provides more than two years of operation. The wireless and compact design allows for flexible placement virtually anywhere indoors.

Key advantages:

• temperature measurement
• relative humidity measurement
• air pressure measurement
• dew point calculation
• VPD calculation
• Zigbee 3.0 connectivity
• High measurement accuracy
• Alerts when set values are exceeded
• Smart automation options
• Environmental data history
• Over 2 years of expected battery life
• Compact wireless design
• Suitable for indoor use

Technical Specifications:

• Model: SNZB-02M
• Product Name: AirGuard TH Pressure
• Type: Zigbee temperature, humidity, and air pressure sensor
• Wireless connection: Zigbee 3.0, IEEE 802.15.4
• Power Supply: 3 V DC
• Battery: CR2477
• Operating Temperature Range: –20 °C to 60 °C
• Operating humidity range: 5–95% RH, non-condensing
• Air pressure range: 700–1100 hPa
• Temperature accuracy: ±0.2 °C
• Humidity accuracy: ±2% RH
• Air pressure accuracy: ±0.1 hPa
• Housing material: PC
• Dimensions: 45 × 45 × 17.6 mm
• Weight with battery: 27.3 g