SPECIFICATIONS

Application Environment: Indoor

Battery Model: LR03 AAA

Brand Name: SONOFF

Camera Equipped: No

Casing Material: PC

Communication method: Zigbee

Compatibility: All Compatible

Dimensions: 66.3x27.8x20mm

High-concerned chemical: none

Humidity Accuracy: ±2% RH

Input: 3.0V

MCU: TLSR8656

Model: SNZB-02B

Operating Humidity: 5-95%RH (non-condensing)

Operating Temperature: -20°C ~ 60°C

Origin: Mainland China

Product Name: AirGuard TH Lite

Product Type: Zigbee Temperature Humidity Sensor

State of Assembly: Ready-to-Go

Temperature Accuracy: ±0.2°C/±0.4°F

Use: others

Wireless Connection: Zigbee 3.0 (IEEE 802.15.4)

Wireless Function: Yes

Description:

SNZB-02B (AirGuard TH Lite) is a Zigbee temperature and humidity sensor designed for precise environmental monitoring. It measures temperature and humidity with high accuracy, while automatically calculating dew point and VPD for deeper environmental insights. Data refreshes every 5 seconds for reliable real-time monitoring. Its compact design fits easily into small spaces and supports both hanging and adhesive mounting. Powered by two standard AAA batteries, it offers convenient tool-free replacement. The app provides real-time readings and up to 6 months of historical data trends.

Hightlight:

【High-Accuracy Sensing】Measures temperature with ±0.2°C (±0.4°F) accuracy and humidity with ±2%RH accuracy. Data refreshes every 5 seconds for reliable real-time monitoring.
【Dew Point & VPD Monitoring】Go beyond basic temperature and humidity monitoring with real-time Dew Point and Vapor Pressure Deficit (VPD) analysis. Detect condensation risks early, help prevent mold growth on walls, furniture, and valuables, and maintain ideal transpiration conditions for healthier plants.
【Slim Design for Small Spaces】Only 27.8 mm wide and 20 mm thick. Supports both hanging and adhesive mounting for flexible installation in guitar cases, cigar humidors, jewelry cabinets, wine racks, and other tight spaces.
【Long Battery Life】Powered by two standard AAA batteries, designed for easy replacement and no specialized tools required, delivering up to 2 years of battery life for long-lasting, maintenance-free operation. 
【6-Month Data History】View temperature, humidity, dew point, and VPD trends anytime in the app. Access up to six months of historical data to monitor long-term environmental changes.

The Invisible Guardian In Small Spaces

Zigbee Temperature Humidity Sensor | SNZB-02B

Zigbee gateway is needed

Precision You Can Trust

Equipped with an industrial-grade Swiss Sensirion sensor, data refreshes every 5 seconds to accurately capture changes in ambient temperature and humidity.Compact Design Fits Anywhere

Compact and exquisite design allows easy placement even in small spaces; equipped with a lanyard, it can be hung freely anywhere.Also Fits Perfectly InHidden Threats You Can Now Monitor

Supports dew point and VPD monitoring, turning invisible environmental threats into visible data.

Say goodbye to moldy walls—start by monitoring the dew point.

Intelligent Sensing. Automatic Control

You can freely set your comfort range and customize smart scenes. When the environment exceeds the preset range, you’ll receive an instant alert, and appliances like electric fan and dehumidifier will automatically turn on.

Works with Apple Home Via Matter Bridge

All solutions integrate SONOFF Zigbee devices into your Apple ecosystem via Matter Bridge, enabling seamless interconnected device control.