SONOFF AirGuard TH 3.6'' LCD Zigbee Temperature And Humidity Sensor | SNZB-02DR2

Every Change Displayed.

Every Comfort Guarded.

AirGuard TH - 3.6'' LCD Zigbee Temp. & Humi. Sensor

*Note:Zigbee Gatway is Needed.

 

Built for Reliable Performance

3.6'' LCD Screen, Data at a Glance

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Display at home, monitor from anywhere 

Achieve remote, real-time monitoring through the eWeLink App. For example, 

check if the temperature in the kitchen remain stable in the living room after the oven starts working.

Accurate Logging & Advanced Analytics 

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*AirGurad PM2.5 integration with the third-party Matter ecosystem requires a Matter hub.

Dual-Sensor Display, Double the Protection

Enable Remote Temperature Display to view data from another sensor on the same gateway directly on

 AirGuard TH—letting you monitor conditions in another room or area at a glance—saving time and giving you extra peace of mind

Check the Nursery Without Leaving Bed

Check your weather cue before stepping out

Link to More Real-life Scenarios

AirGuard TH operates reliably from –20–60°C and 0–100% RH, covering nearly all home environments. 

With its Remote Temperature Display, you can pair it with various other sensor types under the same gateway and unlock more 

versatile monitoring scenarios.

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Trigger Whole-Home Environment Control

Automatically triggers smart scenes and sends instant alerts to your phone when temperature or humidity crosses your set thresholds——keeping your entire home in balance, effortlessly.

No gateway? Try ‘Proximity Mode’!

For easier use of AirGuard TH, you can connect the device directly to your phone. 

No hub required and still enjoy real-time Temp. & Humi. monitoring and analytics within communication range.

Note：Once the device is connected to a gateway, Proximity Mode will be disabled. Switching modes will restore the device to factory settings.

Voice Control with Alexa, Google Home & More

Check Temp. & Humi. readings with your voice.

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.

Easily Integrates with Open-Source Platforms

Integrate your devices into the Home Assistant open-source platform with SONOFF Dongle Series, create your own temperature control solution.

Zigbee Hub Compatibility

AirGuard Series Comparison

4 Steps to Use

Easily set up. Download the APP, scan the QR code to connect with the zigbee hub and control!

Specifications

Specs & User Manual

AirGuard TH is a Zigbee LCD temperature and humidity sensor designed for comprehensive indoor climate monitoring. Equipped with a 3.6-inch large display, it shows real-time temperature, humidity, 24-hour extremes, and remote sensor data at a glance. The data can be monitored via App and viewed in multiple curves and charts. In Zigbee mode, it can link with SNZB-02/02P/02WD/02D/02LD devices to instantly display other sensor readings, enabling fast checks without using a phone or entering the room. It calculates dew point and VPD curves for quantitative air quality insights and supports adjustable reporting intervals for tailored data updates. Voice query is avaliable after integrated with Alexa, Google Home and SmartThings, making climate management smarter and more convenient.

Model	SNZB-02DR2
MCU	TLSR8656F512ET32
Zigbee	IEEE 802.15.4
Net Weight	99.3 g (Battery included)
Product Dimension	95 × 70 × 18.2 mm
Casing Material	PC + ABS
Working Temperature	-20°C to 60°C
Working Humidity	5%–95% RH, non-condensing
Certification	CE / FCC / RoHS
FCC ID	2APN5-SNZB02DR2

​User Manual(PDF)

Frequently asked questions

1.What does mininmum resolution mean?What is the minimum resolution of AirGuard TH?​

The smallest measurable change that causes the displayed value on the AirGuard TH to update. Simply put, it refers to how many decimal places the screen data is precise to.

As for AirGuard TH:

Temperature: 0.1°C / 0.1°F

Humidity: 1% RH on display; 0.1% on app

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2.What does accuracy mean?what's the Accuracy of AirGuard TH?

Accuracy refers to the maximum deviation between the measured value and the true value.

As for AirGuard TH:

*Temperture: ±0.2℃（-20~60℃）

*Humidity: ±2%RH （0~100%RH）

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3.What's the default reporting interval and reportable change? How can I adjust it?

*Temperature reportable change: default ±0.2℃, range ±0.2~±1℃

*Humidity reportable change: default ±1%RH, range ±1%RH~±5%RH

If there's a change in value, the default reporting interval is 5s and the ajustable range is 5s~1h.​

4.Does it support use on open-source platforms?

Yes. For example, with Home Assistant, you can pair the device using Dongle Series, add it via ZHA or Zigbee2MQTT (Z2M).

Please note that currently you need a script to add it to ZHA, please check the instruction and the script at SONOFF Help Center.