SONOFF AirGuard Series E-Ink Zigbee Temperature Humidity Sensor | SNZB-02UL
SONOFF AirGuard Series E-Ink Zigbee Temperature Humidity Sensor | SNZB-02UL
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Description ▼
The SONOFF SNZB-02UL (AirGuard) is a Zigbee temperature and humidity sensor with a 2.9-inch E-Ink screen. On its own it shows the current reading and the last 6 hours. Paired to a hub, the screen can also show time, date, weather, and a comfort icon.
KEY FEATURES
- 2.9" E-Ink display, readable in bright light, nearly 180° viewing angle
- Sensirion sensor: about ±0.2°C and ±2% RH, refresh about every 5 seconds
- Button shows the past 6 hours of temperature and humidity on the screen
- Zigbee 3.0 (TLSR8258). Needs a Zigbee hub for app, scenes, and extra screen data
- Home Assistant through Zigbee2MQTT or ZHA with a SONOFF dongle or other coordinator
- Stand, built-in magnet, wall holes, and adhesive pad
- 2× AAA. SONOFF lists 8+ months on a gateway and 15+ months standalone (lab figures)
SPECIFICATIONS
| Category | Details |
|---|---|
| Model | SONOFF SNZB-02UL (AirGuard) |
| MCU | TLSR8258 |
| Radio | Zigbee (IEEE 802.15.4) |
| Display | 2.9-inch E-Ink |
| Accuracy | Temperature ±0.2°C (±0.4°F) Humidity ±2% RH |
| Power | 2× AAA (LR03), 3 V |
| Working range | 0–50°C 5–95% RH, non-condensing Indoor |
| Size | 99.1 × 51.1 × 18.6 mm |
| Weight | 91 g with batteries |
| Case | PC, white |
What's Included:
- 1 × SNZB-02UL
- 2 × AAA batteries (pull the insulation tab)
- 1 × adhesive pad
NOTES
- Standalone, the screen shows temperature, humidity, and 6-hour history. Time, date, weather, and remote readings need a Zigbee gateway or Home Assistant
- Zigbee2MQTT supports it out of the box. Remote sensor and weather icons need a script. ZHA support is still limited until the native integration is merged
- Double-press the back button to switch °C and °F
- E-Ink flashes when it refreshes, and it can hold the last image after the batteries are removed. Both are normal
- Keep it in 0–50°C. Outside that range the screen can ghost
- Alexa, Google, and Apple Home go through eWeLink or a SONOFF Matter bridge, not a direct connection
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SKU:E1080
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