Description
The SONOFF AirGuard TH Pressure (SNZB-02M) is a Zigbee 3.0 sensor from the SONOFF AirGuard Series that measures temperature, humidity and air pressure. The eWeLink app also calculates dew point and VPD, giving you complete 5-in-1 indoor climate monitoring.
It is fully wireless and runs on a CR2477 battery for more than 2 years, so you can place it on ceilings, corners, shelves or windows. Set comfort ranges to get instant alerts, and create Zigbee automations that switch fans, humidifiers, air conditioners or window openers on their own.
Note: a Zigbee gateway is required (see "Works With" below).
Key Features
- 5-in-1 monitoring: temperature, humidity and air pressure, plus dew point and VPD in the app
- High precision: ±0.2°C (±0.4°F), ±2% RH and ±0.1 hPa
- Operating pressure range: 700–1100 hPa
- More than 2 years of battery life (CR2477 battery included)
- Instant alerts when readings leave your comfort range
- Zigbee 3.0 automations for fans, humidifiers, air conditioners and window openers
- 6 months of environmental history in the app
- Compact 45 × 45 × 17.6 mm body with magnetic, screw or adhesive mounting
- Voice control through eWeLink cloud-to-cloud integration with Alexa and Google Home
- Works with Apple Home through a Matter bridge, and with open-source Zigbee platforms
Works With
Technical Specifications
| Specification |
Details |
| Model |
SNZB-02M |
| Product Name |
AirGuard TH Pressure |
| Wireless Protocol |
Zigbee 3.0 (IEEE 802.15.4) |
| MCU |
EFR32MG22C224F512GN32 |
| Power Input |
3.0V ⎓ (CR2477 battery, included) |
| Battery Life |
More than 2 years |
| Temperature Accuracy |
±0.2°C / ±0.4°F |
| Humidity Accuracy |
±2% RH |
| Pressure Accuracy |
±0.1 hPa |
| Operating Pressure |
700–1100 hPa |
| Operating Temperature |
-20°C ~ 60°C |
| Operating Humidity |
5% ~ 95% RH, non-condensing |
| Application Environment |
Indoor (not waterproof) |
| Casing Material |
PC |
| Color |
White |
| Dimensions |
45 × 45 × 17.6 mm |
| Net Weight |
27.3 g (including battery) |
| Certifications |
CE, FCC, RoHS |
What's in the Box
- 1 × SNZB-02M sensor
- 1 × CR2477 battery
- 1 × User manual
Why Choose the SONOFF SNZB-02M?
- Adds air pressure to precise temperature and humidity readings for a complete picture of indoor comfort
- Useful for weather trends, reptile care, plant growing and wine storage
- Long battery life and fully wireless placement
- Automations that react on their own, without opening the app
Downloads
⬇ Download User Manual (PDF)
Warranty: 12-month warranty from the Official Distributor.
