Sonoff AirGuard TH 3.6'' LCD Zigbee Temperature And Humidity Sensor

See Your Indoor Climate Clearly, At a Glance

Take control of your indoor environment with the SONOFF AirGuard TH SNZB-02DR2, a smart Zigbee temperature and humidity sensor with a large 3.6-inch LCD display. Monitor real-time temperature and humidity, 24-hour Min/Max readings, and supported remote sensor data without constantly reaching for your phone.

✔ 3.6'' Large LCD Display
✔ Accurate Temperature & Humidity Monitoring
✔ Zigbee Smart Home Connectivity
✔ Remote Sensor Temperature Display
✔ Up to 6 Months of Historical Data
✔ Dew Point & VPD Analysis

Ideal for smart homes, bedrooms, nurseries, offices, greenhouses, wine cellars, collection rooms, and RVs.

Built for Smarter Indoor Climate Monitoring

Knowing the temperature is only part of the picture. Humidity changes can affect comfort, plants, storage environments, and how your connected climate-control devices operate.

The SONOFF AirGuard TH gives you clearer environmental information in one convenient display. Its large LCD screen makes readings easy to see, while Zigbee connectivity allows you to connect the sensor to compatible smart-home systems for remote monitoring and automation.

Whether you're checking a bedroom before going to sleep, monitoring a nursery from another room, or managing conditions in a greenhouse, AirGuard TH helps you make decisions based on real environmental data.

Why Choose the SONOFF AirGuard TH?

Choosing a smart temperature and humidity sensor is about more than simply seeing two numbers. You need clear information, reliable readings, useful historical data, and compatibility with the smart-home system you already use.

SONOFF AirGuard TH combines:

Accurate temperature monitoring up to ±0.2°C

Humidity accuracy up to ±2%RH

Large 3.6-inch LCD screen for easy viewing

Remote temperature display from compatible SONOFF sensors

Up to 6 months of detailed historical records

Dew point and VPD analysis

Adjustable temperature and humidity reporting intervals

Home Assistant, Zigbee2MQTT, eWeLink and supported smart-home integration

With the right Zigbee gateway or coordinator, the AirGuard TH becomes more than a display—it becomes a useful part of your smart climate monitoring and home automation system.

Why AirGuard TH Compared to Basic Sensors

The Difference You Notice Immediately

Clear Environmental Data at a Glance

The 3.6-inch LCD display gives you a much larger viewing area than many compact temperature sensors. See temperature, humidity, 24-hour extremes, and supported remote sensor information without opening your smartphone.

Monitor More Than One Area

In Zigbee mode, AirGuard TH can display temperature data from compatible SNZB-02 series sensors connected to the same supported SONOFF Zigbee gateway. Check another room or area without physically walking there to take a reading.

Understand Environmental Trends

With the eWeLink App and compatible Zigbee gateway, you can access up to six months of detailed records with maximum, minimum, and average curves. This makes it easier to identify patterns instead of relying on individual readings.

Go Beyond Temperature & Humidity

Built-in dew point and VPD analysis provides additional environmental information for users who need more than basic temperature and humidity readings. This can be especially useful for plant-growing and controlled indoor environments.

Build Smarter Automations

Use temperature and humidity data with compatible smart-home devices to create automated responses. For example, your system can help control a humidifier or air conditioner when selected environmental conditions are reached.

Premium Features

Current SONOFF specifications list a 95 × 70 × 18.2 mm product size, 99.3 g net weight including battery, an operating temperature range of -20°C to 60°C, and CE/FCC/RoHS certification.

How to Use the AirGuard TH

Using the SONOFF AirGuard TH temperature and humidity sensor is straightforward:

1. Install the battery and power on the AirGuard TH.

2. Choose your preferred setup: compatible Zigbee gateway/coordinator integration or Proximity Mode for supported direct phone monitoring.

3. For Zigbee operation, pair it with a compatible gateway or coordinator.

4. Add the sensor to your preferred smart-home platform.

5. Position the AirGuard TH where you want to monitor indoor conditions.

6. Use the LCD display for quick local readings or the supported app/platform for remote monitoring and historical data.

7. Create smart scenes using temperature or humidity conditions where supported.

For eWeLink-based remote monitoring and smart-home automation, a compatible SONOFF Zigbee gateway is required. Home Assistant users can use compatible SONOFF Dongle devices with Zigbee2MQTT or ZHA; SONOFF currently notes that ZHA requires a script for this device.

Who Is It For?

The SONOFF AirGuard TH is ideal for:

Smart home owners

Home Assistant users

Zigbee2MQTT users

eWeLink smart-home users

Bedroom and nursery monitoring

Office and living-room monitoring

Plant growers and greenhouse users

Wine cellar monitoring

Collection room monitoring

RV owners

Anyone who wants more accurate and convenient indoor climate monitoring

If you want a large-display temperature and humidity sensor that can grow with your smart-home setup, AirGuard TH gives you the visibility and connectivity to monitor your environment with greater confidence.

Smart Home Integration

AirGuard TH is designed to work within modern smart-home environments. SONOFF supports integration with its Zigbee ecosystem and states that the device can be used with Home Assistant, Zigbee2MQTT and other compatible setups. It can also be incorporated into Apple Home environments through compatible SONOFF Matter Bridge solutions. Voice queries are available after integration with supported platforms including Alexa, Google Home and SmartThings.

This flexibility makes it suitable for both straightforward home monitoring and more advanced smart home automation. You can start with simple temperature and humidity monitoring and expand your system as your needs grow.

Important Setup Information

A compatible Zigbee gateway or coordinator is required for Zigbee-based smart-home integration, remote monitoring through eWeLink, remote sensor functionality, and automation.

Compatible SONOFF gateway options listed by SONOFF include Bridge-P, Bridge-U, NSPanel Pro and iHost for remote sensor functionality.

The AirGuard TH also supports Proximity Mode, which allows direct phone connectivity for supported local monitoring without a Zigbee gateway. Switching between Proximity Mode and gateway-connected operation may reset the device to factory settings, so choose your preferred operating mode before configuring your setup.

Specifications

Specifications are based on current SONOFF product information.

Frequently Asked Questions

Does the SONOFF AirGuard TH require a Zigbee hub?

A Zigbee gateway or coordinator is required for Zigbee smart-home functions such as eWeLink remote monitoring, automation and compatible remote sensor functionality. However, the device also supports Proximity Mode for direct phone monitoring without a Zigbee gateway.

Can I use the AirGuard TH with Home Assistant?

Yes. SONOFF states that the AirGuard TH can be integrated with Home Assistant using compatible SONOFF Dongle devices and Zigbee2MQTT or ZHA. SONOFF currently notes that ZHA requires a script for this device.

How accurate is the AirGuard TH?

The sensor provides temperature accuracy of up to ±0.2°C and humidity accuracy of up to ±2%RH. Temperature is displayed at 0.1°C/0.1°F resolution, while humidity is displayed at 1%RH on the device and 0.1% in the app.

Can it display readings from another room?

Yes. In Zigbee mode, AirGuard TH can display temperature readings from compatible SONOFF SNZB-02 series sensors connected to the same supported Zigbee gateway.

Can it automate a humidifier or air conditioner?

Yes. When connected to a compatible smart-home ecosystem, temperature and humidity readings can be used with smart scenes and connected devices to create automated climate-control routines.

Take Control of Your Indoor Climate

Stop relying on basic temperature readings and start understanding your indoor environment with the SONOFF AirGuard TH 3.6'' LCD Zigbee Temperature & Humidity Sensor. With its large easy-to-read display, accurate sensing, remote sensor support, historical data, dew point and VPD analysis, and flexible smart-home integration, it gives you a clearer way to monitor and manage the conditions that matter.

Whether you're improving comfort at home, monitoring a nursery, managing plants in a greenhouse, or building a more advanced Zigbee smart home, AirGuard TH puts useful environmental information where you can see it—and gives your automation system the data it needs to respond.

Add the SONOFF AirGuard TH to your smart-home setup and make indoor climate monitoring clearer, smarter, and more connected.