SONOFF SNZB-02DR2 AirGuard TH, Indoor Smart Zigbee Temperature and Humidity Sensor, 3.6'' LCD Display, App Monitoring with ch
Reviewed 9 August 2026 · price checked live
Check price on Amazon →Overview
SONOFF SNZB-02DR2 AirGuard TH, Indoor Smart Zigbee Temperature is one of the 30 thermometers & meteorological instruments products in our catalogue, tracked on rating, review volume and live price. The maker describes it as follows: The large LCD stays crisp and readable from several meters away, suitable for the elderly, providing rich information grasped at a glance: Real-time data(updated every 5s). You can monitor the temperature and humidity in real time on the App remotely, with up to 120m/400ft coverage. Receive instant alerts from the App when data exceeds the set comfort level. Those are the seller's own claims rather than our testing, so treat them as a starting point. On Amazon it holds 4.5 out of 5 from 320 ratings. What that score is worth next to its rivals is set out below.
- Brand
- SONOFF
- Amazon rating
- 4.5 / 5 from 320 ratings
- vs Thermometers & Meteorological Instruments
- 0.1 above the category median of 4.4
- Rank in category
- 18 of 30 rated thermometers & meteorological instruments we track
- Price position
- Mid-priced (category spans £0.98 to £31.99)
- How proven
- Fewer ratings than most rivals here, so less settled
How it compares in Thermometers & Meteorological Instruments
Across the 30 rated thermometers & meteorological instruments products we track, the typical score is 4.4 out of 5. This one sits at 4.5, which is around the middle of the category. Ratings alone will not separate it from its rivals here, so price and the specifics below matter more than the star count.
It carries 320 ratings against a category median of 1,715. That is a thin base by the standards of this category, so treat the score as provisional: a handful of extra reviews can still move it either way.
On price it sits in the middle third of a category running from £0.98 to £31.99, where the midpoint is about £8.97. That is the part of the range where most sensible buys sit, neither cutting corners nor paying for the name.
Worked out from the 30 thermometers & meteorological instruments products in our catalogue, not from the brand's own claims. How we rank →
Key features
- [3.6'' Large LCD Display with Daily Highs and Lows] The large LCD stays crisp and readable from several meters away, suitable for the elderly, providing rich information grasped at a glance: Real-time data(updated every 5s), Max/Min data in 24-hour and comfort level signals.
- [App Remote Real-time monitoring & notification] You can monitor the temperature and humidity in real time on the App remotely, with up to 120m/400ft coverage. Receive instant alerts from the App when data exceeds the set comfort level.
- [Remote Data Display for Multi-Room Monitoring] The device can display real-time data from another temp. & humi. sensor after setting it as remote data source. Help expand your monitoring area, keep track of the nursery, bathroom, wine cellar, or greenhouse conditions without walking over.
- [High Accuracy & Real-time Chart] With the Swiss Sensirion sensor, the temperature and humidity accuracy is maintained respectively at ±0.2℃ (-20~60℃) and ±2% RH(0~100%RH). App provides a detailed real-time chart recording temp.& humi. data per minute in recent 24 hours.
- [Half-year History Record & Diverse Charts] View 6-month detailed records with maximum, minimum, and average curves across four time spans — daily, weekly, monthly, and half-year. The device also provides dew point and VPD insights. All history record can be exported for free.
