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The SONOFF digital thermometer with external probe offers accurate temperature measurement in tanks, aquariums, refrigerators, saunas or chemical environments. Thanks to the 1.5 m waterproof probe with a temperature range of -40 to +115 °C and IP65 protection, you can measure the temperature of liquids even in wet environments without worry. The bright 2.2″ LCD display gives you an instant overview of the temperature on site, while the Zigbee 3.0 protocol lets you connect to a compatible hub and the eWeLink app gives you up to 180 days of measurement history that you can easily export and analyse. With ±0.5 °C accuracy and the smart scene function, you can let the SONOFF smart thermometer automatically trigger actions such as switching on the heating or pump when the temperature drops below a set limit. The CR2477 button cell battery lasts up to 2 years, the design is both elegant and durable thanks to the high quality PC+ABS material and IP65 protection. The SONOFF digital thermometer also supports integrated calibration within Zigbee2MQTT or ZHA, giving you reliable and accurate measurements not only for home use, but also for hobby and professional applications.


The SONOFF digital thermometer with 1.5 m external probe offers extremely flexible measurement options, whether you need to monitor the temperature of liquids or confined spaces. The probe easily reaches into water, aquariums, tanks or refrigerators where conventional sensors cannot. By connecting to the eWeLink app, you get accurate real-time data and clear temperature history graphs.

With the SONOFF smart thermometer, you get a detailed overview of the temperature even in retrospect. The eWeLink app allows you to view historical data by day, month or up to six months back. The clear graphs make it easy to plan the ideal temperature in your boiler, fridge or greenhouse, for example. In addition, you can export the data for further analysis or archiving.

The SONOFF smart thermometer allows you to create automations and alerts based on the current temperature to protect the food in your fridge or maintain the optimal temperature in your aquarium. You can easily set up smart scenes using the eWeLink app - for example, you'll get a notification when the fridge exceeds 27°C, or the ZBMINIR2 relay automatically switches on the heater when it drops below 40°C.

Thanks to the integration with the Zigbee Hub, you can easily connect the SONOFF SNZB-02LD to a voice assistant and control it completely hands-free. Voice queries allow you to have an instant overview of the current temperature without having to open the app or be physically present at the device.

The SONOFF IP65 Zigbee LCD Smart Thermometer can be seamlessly integrated into open-source platforms, such as Home Assistant, using the SONOFF ZBDongle Zigbee dongles. You get full control over your smart solution and the ability to create a completely customized temperature monitoring system. Whether you want to view data in clear dashboards, set up advanced automation or connect the temperature sensor to other devices in the home, open integration gives you complete freedom and flexibility.

The SONOFF SNZB-02LD (Probe Version) digital thermometer with external probe offers reliable temperature and humidity measurements that you can see directly on the clear LCD display. Thanks to its IP65 protection, it is also suitable for more demanding conditions, for example in the basement, garage or outdoor areas under a shelter. Flexible use is ensured by the various installation options - you can simply attach it with the magnetic back or hang it on the handy loop.


Specifications can be changed without notice. Images are for illustrative purposes only.