ZigBee LCD temperature and humidity sensor Sonoff AirGuard TH SNZB-02DR2

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 values, and air comfort level in real time. It combines laboratory accuracy (±0.2 °C / ±2% relative humidity), modern wireless connectivity, and energy-efficient battery operation in one compact device. With it, you always know whether a 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. One glance is enough to check the temperature, humidity, minimum/maximum values for the last 24 hours and the graphic comfort indicator. There’s no need to open the app or reach for your phone – the information is always at your fingertips, exactly when you need it.

Precise high-end sensor – Sensirion SHT40

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

ZigBee 3.0 – smart automation without cables

Thanks to ZigBee 3.0 connectivity, the sensor works stably, responds quickly, and consumes minimal energy. Once connected to the interface, you can monitor data in the app, set alerts, and create automations – e.g. turning on a humidifier when the air is too dry, or ventilation when the humidity is excessive. 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 presents them in the form of clear 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 or watering 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 use your voice to check the temperature, 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 even without a passage

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 °C/°F units, 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 ability to stand or hang make the AirGuard TH suitable for literally anywhere – in a bedroom, nursery, greenhouse, pantry, basement, warehouse or office. The wide operating range (from -20°C to 60°C, 5-95% relative humidity) ensures reliability in a variety of conditions. It is a small device that gives you excellent control over the comfort and safety of your environment every day.

Included

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

Warranty: 12 months

The text is machine translated.

Same summary

The Sonoff AirGuard TH SNZB-02DR2 ZigBee LCD temperature and humidity sensor is suitable for anyone who wants to have constant control over the microclimate in their home or office and is looking for a solution as part of a larger smart system. Using the ZigBee protocol and LCD display, it allows integration into centralized systems, but requires an appropriate control panel to operate. It is less suitable for users who would like independent, quick installation without additional equipment or an Internet connection via WiFi. The key advantage of this model is accurate monitoring of room conditions and the possibility of use in automated smart home scenarios.

Recommendation source: Enaa guides and team experience.

User view

Typical users of this type of smart sensor are those who care about air quality control in their home, children's room or work area. In practice, temperature and humidity control is convenient for automatically adjusting heating, air conditioning or humidifiers in conjunction with other smart devices, especially if a ZigBee base is already in place. Such solutions are common in locations where comfort and energy optimization are a priority, such as in smart homes and for users who value long-term data reliability.

Users often choose Sonoff products because of their recognition, affordability, and the ability to easily expand their smart home within a unified ecosystem.

Why buy at Enaa

At Enaa, you can choose from proven smart sensors in various configurations and choose solutions from renowned brands, making it easy to integrate devices in your home. In addition, Enaa offers clearly categorized products, making it easier to compare products based on ecosystem compatibility or your home's needs.

Answers to frequently asked questions

Does this sensor work without an additional ZigBee hub?

No, a ZigBee hub is required for proper operation, as the sensor itself is not a standalone unit and connects via the ZigBee network.

Where can the sensor be installed and what types of rooms is it best suited for?

The sensor is intended for use indoors, such as living rooms, bedrooms, study rooms or rooms where you want to monitor the climate. It is not suitable for use outdoors or in very humid environments, such as bathrooms, without proper protection.

Is the sensor only compatible with Sonoff products or can I also use it with devices from other manufacturers?

Since it is based on the ZigBee protocol, it can also be integrated with other ZigBee-enabled devices and has an open way to add additional sensors. We recommend that you check compatibility with your smart home control panel before purchasing.

What does the LCD display on the sensor mean?

The LCD display on the sensor allows you to monitor basic temperature and humidity information directly on the device itself, without the need to check the data in the app.

What is the advantage of using ZigBee sensors over WiFi versions?

ZigBee sensors in larger systems enable lower energy consumption and centralized management, which is especially convenient with many connected devices in a smart home.

Description updated: April 2026