SONOFF ZigBee SNZB-02DR2 Temperature and Humidity Sensor [2 PACK]

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

Sonoff AirGuard TH SNZB-02DR2 is a smart temperature and humidity sensor ZigBee with a large 3.6” LCD display that shows real-time conditions, daily maximum and minimum, and air comfort level. It combines laboratory precision (±0.2°C / ±2% RH), modern wireless connectivity, and energy-efficient battery operation in one compact device. With it, you always know whether the room has a healthy microclimate – no guessing, no assumptions, no unnecessary complications.

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Clear and Large 3.6” LCD Screen

The clear, high-contrast display is designed so that the most important data is visible from a distance. A single glance is enough to check the temperature, humidity, min/max values from the last 24 hours, and a graphical comfort indicator. You don’t need to open an app or reach for your phone – the information is always at hand, exactly when you need it.

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Premium Class Precision Sensor – Sensirion SHT40

The heart of the device is the professional Sensirion SHT40 sensor, known for industrial and measurement applications. It provides exceptionally stable and reliable readings, translating into real benefits: better sleep conditions, healthier air for children, and protection for plants, food, or wine from excessive moisture. This is equipment that measures accurately – because comfort leaves no room for chance.

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ZigBee 3.0 – Smart Automation Without Wires

Thanks to ZigBee 3.0 connectivity, the sensor operates stably, responds quickly, and consumes minimal energy. Once paired with a gateway, you can monitor data in the app, set alerts, and create automations – for example, turning on a humidifier when the air is too dry or ventilation when humidity is excessive. It’s a smart home that takes care of your comfort before you even notice a problem.

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Data History and Analytics

AirGuard TH records measurements and presents them in clear graphs, allowing you to track changes over time – with accuracy down to minutes. Daily, weekly, and multi-month statistics are available, as well as information on dew point and VPD. This is a practical tool that helps you better plan ventilation, heating, or plant watering and effectively prevent mold and excessive moisture.

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Works with Your Smart Home System

The sensor easily integrates with popular platforms and hubs: Sonoff, Home Assistant, Zigbee2MQTT, SmartThings, as well as voice assistants like Alexa or Google Home, and the Matter Bridge environment. You can check the temperature by voice, view data remotely, and turn devices on from anywhere. This offers complete freedom and flexibility regardless of the chosen ecosystem.

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Proximity Mode – Use Even Without a Gateway

Don’t have a ZigBee hub? No problem. In Proximity mode, you can connect directly to your smartphone via Bluetooth to check current parameters, calibrate the sensor, change units °C/°F, or export data. This is an ideal solution for those who want to start with simple monitoring and later expand the system with automation.

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Compact Design and Versatile Use

The slim casing made of durable PC+ABS, powered by two AAA batteries, and the option to stand or hang make the AirGuard TH fit literally anywhere – in the bedroom, child’s room, greenhouse, pantry, basement, storage, or office. A wide operating range (-20°C to 60°C, 5–95% RH) ensures reliability in various conditions. This small device provides great control over the comfort and safety of your environment every day.

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Included in the Package

• ZigBee LCD Temperature and Humidity Sensor Sonoff AirGuard TH SNZB-02DR2 x2
• User manual

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	High-contrast 3.6" LCD
Data Displayed on Screen	Current temperature current humidity min/max 24h comfort indicator battery status
Measuring 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 graphs, min/max daily and long-term statistics (up to approx. 6 months in the app)
Additional Analytics 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
Dimensions	95 × 70 × 18.2 mm
Weight	99.3 g (with batteries)