Sonoff-C AirGuard TH Zigbee Temperature & Humidity Sensor with 3.6" LCD | SNZB-02DR2
Sonoff-C AirGuard TH Zigbee Temperature & Humidity Sensor with 3.6" LCD | SNZB-02DR2
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Sonoff AirGuard TH Zigbee Temperature & Humidity Sensor with 3.6" LCD | SNZB-02DR2
The SONOFF AirGuard TH (SNZB-02DR2) is a Zigbee temperature and humidity sensor with a large 3.6-inch LCD. The screen shows the current temperature and humidity together with the 24-hour highs and lows, and it can also display the reading of a second SONOFF sensor in another room.
It runs on two AAA batteries and has a built-in stand and a hook for wall mounting.
Color: White
Large 3.6" Display: Real-time temperature and humidity plus the 24-hour maximum and minimum are visible at a glance, without picking up your phone. Through a Zigbee gateway the same data is also available remotely in the eWeLink app.
6-Month History with Dew Point & VPD: The app keeps up to 6 months of records with maximum, minimum and average curves, and adds dew point and VPD analysis to help judge condensation risk and growing conditions.
Remote Temperature Display: In Zigbee mode the screen can show the temperature from another sensor — SNZB-02P, SNZB-02D, SNZB-02WD or SNZB-02LD — so you can check a nursery, cellar or other room from where you are. Both devices must be on the same SONOFF Zigbee gateway (ZBBridge-P, ZBBridge-U, NSPanel Pro or iHost).
Alerts & Smart Scenes: Get a notification when temperature or humidity leaves your chosen range, and link the sensor with humidifiers, air conditioners or other smart devices to keep conditions comfortable automatically. Reporting intervals can be adjusted by threshold or by time.
Who it's for / Works with: Living rooms, bedrooms, nurseries, offices, greenhouses or wine cellars where an easy-to-read display is useful. SONOFF lists these Zigbee hubs: SONOFF ZBBridge-P, ZBBridge-U, NSPanel Pro and iHost (eWeLink app); Home Assistant via ZHA or Zigbee2MQTT with a SONOFF ZBDongle-P, ZBDongle-E, Dongle-M, Dongle-PMG24 or Dongle-LMG21; Amazon Echo (Plus 2nd Gen, Echo 4th Gen, Show 2nd Gen); and Aeotec SmartThings Hub (V3).
Good to know: A Zigbee hub is needed for app monitoring, history and automations. Using it with ZHA currently needs a script from SONOFF's help center. The remote temperature display works only with a SONOFF gateway. Update the gateway to the latest firmware before pairing.
Technical Specifications
| Specification | SNZB-02DR2 |
|---|---|
| Product name | AirGuard TH (AirGuard series) |
| Model | SNZB-02DR2 |
| MCU | TLSR8656F512ET32 |
| Wireless | Zigbee (IEEE 802.15.4) |
| Display | 3.6" LCD |
| Input | 3.0V (2 × 1.5V batteries) |
| Battery | 2 × AAA (LR03) |
| Net weight | 99.3 g (with batteries) |
| Dimensions | 95 × 70 × 18.2 mm |
| Casing material | PC + ABS |
| Application | Indoor |
| Working temperature | -20°C to 60°C |
| Working humidity | 5–95% RH, non-condensing |
| Certifications | CE, FCC, RoHS (FCC ID 2APN5-SNZB02DR2) |
📄 User manual: Download the official SONOFF SNZB-02DR2 user manual (PDF)