SONOFF ZigBee SNZB-02DR2 temperature and humidity sensor, 2 pieces

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

Clear and large 3.6-inch LCD screen

The clear, high-contrast display is designed to make the most important information visible from a distance. Check temperature, humidity, minimum/maximum values of the last 24 hours and a graphic comfort indicator with a single glance. No need to open the app or reach for your phone - the information is always at your fingertips, exactly when you need it.

High-end precision sensor – Sensirion SHT40

At the heart of the device is the professional Sensirion SHT40 sensor, known for its use in industrial and measurement applications. It provides extremely stable and reliable readings, which translate into real benefits: better sleeping conditions, healthier air for children, and protection of plants, food and wine from excessive humidity. This is a device that measures precisely – because there is no room for chance when it comes to comfort.

ZigBee 3.0 – smart, wireless automation

Thanks to ZigBee 3.0 connectivity, the sensor works reliably, responds quickly and consumes minimal energy. Once connected to the interface, you can monitor data, set alerts and create automations in the app – for example, turning on a humidifier when the air is too dry or activating ventilation when the humidity is too high. This is a smart home that takes care of your comfort before you even notice a problem.

Data history and analytics

AirGuard TH records measurements and displays 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 available, as well as information on dew point and VPD. It is a practical tool that helps you better plan ventilation, heating and watering of plants and effectively prevent mold and excessive humidity.

Works with your smart home system

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

Proximity mode – use it 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, switch between °C and °F, or export data. This is the ideal solution for those who want to start with simple monitoring and later expand the system with automation.

Compact design and versatile use

The slim, durable PC+ABS housing, powered by two AAA batteries, and the option to stand upright or hang means that the AirGuard TH fits literally anywhere – in a bedroom, nursery, greenhouse, pantry, basement, warehouse or office. The wide operating range (-20°C to 60°C, 5-95% relative humidity) ensures reliability in a variety of conditions. This small device gives you excellent control over the comfort and safety of your environment every day.

Included in the kit

• ZigBee LCD temperature and humidity sensor Sonoff AirGuard TH SNZB-02DR2 x2
• User manual

Warranty: 12 months

The text is machine translated.

Same summary

The SONOFF ZigBee SNZB-02DR2 dual set of temperature and humidity sensors is practical for users who want to easily monitor the climate in multiple rooms within a smart home. The sensors are especially suitable for those who already have a ZigBee hub or plan to integrate smart devices more widely. Since they operate via the ZigBee standard, they are not a suitable choice for users who would like a direct connection via a WiFi network or operation without additional components. It is especially worth noting that for proper use, an appropriate central unit is required, so potential users should first check compatibility with their existing ecosystem.

Recommendation source: Enaa guides and team experiences.

User view

These smart sensors are most often used in living and working spaces where users want to have better control over temperature and humidity - for example in living rooms, bedrooms, basements or children's rooms. They are suitable for modern smart homes, where automation of heating, cooling or ventilation is important, as well as for anyone who wants to quickly check the conditions in multiple rooms via an app. Due to the need for a ZigBee hub, the product makes the most sense for those who already have or want to establish a wider smart ecosystem.

Users often choose Sonoff products also because of their easy integration into various smart systems and fairly reliable operation in larger networks of devices.

Why buy at Enaa

Through Enaa, you can choose from a variety of proven smart sensors, which allows for easy comparison with similar products in the same category, and you can also use the friendly support of our team, which specializes in home and family solutions, to help you make your choice.

Answers to frequently asked questions

Do the sensors work independently without an additional control unit?

No, for the proper functioning of SONOFF ZigBee SNZB-02DR2 sensors, a ZigBee central unit is required, which allows connection to the application and other devices in the smart home.

Are the sensors compatible with all ZigBee control panels?

The sensors are designed to work with ZigBee control panels, but we recommend that you check compatibility with your specific control panel beforehand, as support may vary depending on the manufacturer and ecosystem implementation.

Where are these sensors most commonly used?

They are most often installed in rooms where users want to accurately monitor temperature and humidity, such as living rooms, pantries, basements, or children's rooms.

Does the operation of the sensors affect the operation of the WiFi network in the apartment?

No, because the sensors use exclusively ZigBee connections, do not burden the home WiFi network and are suitable for installation in larger homes with multiple devices.

What should I do if I don't have a ZigBee hub in my home yet?

If you don't have a ZigBee central unit yet, you will need an additional central unit for the sensors to operate, through which they will also connect to your smart system and application.

Description updated: July 2026