SonOff
Zigbee Temperature & Humidity Sensor SONOFF SNZB-02P - Accuracy ±0.2°C - Swiss Sensor - 4 years
Description
Too hot, too humid, degraded air quality: indoor comfort issues often go unnoticed due to a lack of reliable measurement. The SNZB-02P integrates a Swiss-made sensor that measures temperature and humidity with clockwork precision, refreshes every 5 seconds, and operates for 4 years on a single battery.
Key points
🇨🇭 Swiss precision sensor - ±0.2°C
The onboard hygrometric sensor is manufactured in Switzerland, guaranteeing an accuracy of ±0.2°C for temperature and ±2% RH for humidity. Significantly more reliable than generic entry-level sensors.
⚡ Refreshes every 5 seconds
Data is updated in near real-time as soon as a variation is detected. Ideal for precisely controlling a thermostatic valve or automatically triggering a VMC.
🔋 4 years of battery life on a single battery
Powered by a CR2477 3V battery. No battery changes for years - the app alerts you when the level gets low.
📊 6-month exportable history
View temperature and humidity curves for the last 6 months from the eWeLink application. Data export available for analysis.
Technical specifications
| Feature | Details |
|---|---|
| Model | SNZB-02P |
| Protocol | Zigbee 3.0 |
| Power supply | 1x CR2477 3V battery (included) |
| Battery life | ~4 years (typical conditions) |
| Temperature accuracy | ±0.2°C / ±0.4°F |
| Humidity accuracy | ±2% RH |
| Refresh rate | 5 seconds (if variation detected) |
| Temperature range | -10°C to +60°C |
| Humidity range | 0 to 100% RH (non-condensing) |
| History | 6 months via eWeLink |
| Dimensions | 45 x 45 x 17.7 mm |
| Weight | 26.7g |
| Mounting | Magnetic mount + 3M adhesive + screws (included) |
| Application | eWeLink (iOS & Android) |
Box contents
- 1x SNZB-02P sensor
- 1x CR2477 battery (pre-installed)
- 1x Magnetic mounting bracket
- 1x 3M double-sided adhesive
- 1x Multi-language quick start guide
⚠️ A compatible Zigbee hub is required to access alerts, history, and automations. Without a hub, the sensor cannot transmit its data. Not waterproof - indoor use only.
Protocol compatibility table
| Protocol | Compatible? | Note |
|---|---|---|
| ⚡ Zigbee | ✅ Native | Zigbee 3.0 |
| 🌐 Matter | ⚠️ Via Matter bridge | Via iHost or ZBBridge-U with Matter bridge activated |
| 📶 WiFi / Tuya | ❌ Not compatible | Zigbee product only |
| 🔷 Bluetooth | ❌ Not compatible | |
| 🔵 Z-Wave | ❌ Not compatible |
Ecosystem compatibility table
| Ecosystem | Compatible? | Conditions |
|---|---|---|
| 🏠 Home Assistant | ✅ Compatible | Via Zigbee2MQTT or ZHA + Zigbee coordinator |
| 🎙️ Amazon Alexa | ✅ Compatible | Via compatible SONOFF hub or Echo with integrated Zigbee hub |
| 📱 Google Home | ✅ Compatible | Via SONOFF hub with eWeLink integration |
| 🍎 Apple HomeKit | ⚠️ Via Matter bridge | Via iHost or ZBBridge-U with Matter bridge activated |
| 🏘️ Jeedom | ✅ Compatible | Via Zigbee2MQTT or ZHA plugin |
| 🏠 Somfy TaHoma | ⚠️ Partial | Limited functionality via TaHoma Switch |
| 🪑 IKEA Home smart | ⚠️ Partial | Possible via third-party Zigbee coordinator |
| 🔵 Tuya / Smart Life | ❌ Not compatible | eWeLink product only |
| 📱 Xiaomi Mi Home | ❌ Not compatible |
💡 Our recommendation: The SNZB-02P is the reference sensor to pair with the TRVZB thermostatic valve. Place it in the room to be heated, away from the radiator - Home Assistant will use its measurement as a reference probe to control the valve with much greater precision than the valve's internal sensor. For baby rooms, configure an alert if the temperature falls outside the 18-22°C range. If you need a local display without an app, opt for the SNZB-02D instead (same sensor, with LCD screen).
Shipping & Returns
We strive to process and ship all orders as quickly as possible. The average processing and delivery time is approximately 7 business days. We work diligently to get your items to you as soon as possible.
We are committed to providing you with a positive shopping experience. If you wish to return an item for any reason, please contact our team. We will review each return request with care and understanding.
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