SONOFF SNZB-02WD IP65 Zigbee Temperature & Humidity Sensor

The smart climate sensor that doesn't shy away from a splash of water – at home and in the greenhouse.

Ordinary temperature sensors are not resistant to moisture, steam, or rain. The SONOFF SNZB-02WD solves this with an IP65-certified splash-proof design and a clear 2.2″ LCD display. Whether you place it in the bathroom, on the balcony, in the greenhouse, the cellar, or a cold storage room – the SNZB-02WD delivers accurate measurements, even in humid and wet conditions.

🛡️ IP65 water-resistant – unique waterproof design

What's special about the SNZB-02WD is its built-in waterproof, breathable membrane. The sensor is fully protected in an IP65 enclosure but measures temperature and humidity through this special membrane, which allows moisture to pass through for measurement – but does not let water in. The design is also UV-resistant, enabling long-term use in covered outdoor environments.

🌡️ High accuracy – Swiss precision sensor

The SNZB-02WD is equipped with a Swiss precision sensor chip:

• Temperature: ±0.2°C, range -20°C to +60°C (suitable for freezers & cold storage!)
• Humidity: ±2% RH, range 0–100% RH
• Resolution: 0.1°C / 0.1% RH

The wider temperature range (-20°C) makes this sensor uniquely suitable for freezers, refrigeration units, and unheated outdoor areas.

🖥️ 2.2″ LCD display with comfort indicator

The clear 2.2″ LCD screen shows real-time temperature, humidity, and battery status. With a double press of the button (under the protective cover), you can switch between °C and °F. The comfort indicator immediately shows whether the climate falls within ideal standards.

🔔 App monitoring, push notifications & historical data

• Real-time monitoring of temperature and humidity
• Push notifications when self-set thresholds are exceeded
• Historical graphs up to 180 days back – exportable
• Calibration possible via the eWeLink app
• Voice control via Alexa or Google Home

🔗 Broadly compatible with popular smart home platforms

• SONOFF own hubs: ZBBridge, ZBBridge-P, ZBBridge-U, NSPanel Pro, iHost, ZBDongle-P, ZBDongle-E
• Home Assistant: via Zigbee2MQTT or ZHA
• Alexa, Google Home and eWeLink
• All other gateways that support Zigbee 3.0

🏠 Local scenes – even without internet

The SNZB-02WD supports local Zigbee scenes. Automations remain active even if your WiFi or internet goes down.

💡 Example automations

• 🚿 Bathroom: humidity above 70% RH → fan turns on automatically.
• 🌱 Greenhouse: temperature drops below 10°C → heating lamp turns on.
• ❄️ Refrigerator or freezer: temperature rises above -15°C → push notification on smartphone.
• 🍷 Wine cellar or basement: alarm for excessive humidity or temperature overrun.
• 🌿 Aquarium or terrarium: automatically activate fogger or heater for deviations.

📦 Technical Specifications

⚠️ Point of attention

The SNZB-02WD has an IP65 rating – protection against splashing water and steam, but not immersion in water. For full outdoor use in the open air, covered mounting is recommended. The sensor does not have a desk stand – mounting is via 3M tape or screws.

🔄 SNZB-02WD vs. SNZB-02D – which do you choose?

❓ Frequently Asked Questions (FAQ)

Is the SNZB-02WD suitable for the bathroom?
Yes! The IP65 enclosure with a breathable membrane protects the electronics from steam and splashing water.

Do I need a hub?
Yes, a compatible Zigbee hub is required: SONOFF ZBDongle-E, NSPanel Pro, or iHost.

Is the battery included?
Yes! Pull out the insulating strip and the sensor is immediately active. Type: CR2477 (3V).

Does it work with Home Assistant?
Yes, via Zigbee2MQTT or ZHA.

How do I switch from °C to °F?
Remove the protective cover at the bottom and press the button twice.

Can I calibrate the measurement?
Yes, a calibration offset can be set via the eWeLink app.

✅ slimhuisje.nl – your technology partner for smart home, we support you in every smart living adventure!