Sonoff SNZB-02P temperature humidity control sensor 4.5 cm

Zigbee 3.0 temperature and humidity sensor

The Sonoff SNZB-02P is a compact indoor thermometer and hygrometer that reports temperature within ±0.2 °C and humidity within ±2 %RH. It connects to a Zigbee 3.0 hub such as SONOFF iHost, NSPanel Pro, ZB Bridge Pro, ZBDongle-E, Echo 4th Gen or SmartThings Hub V3. The device is designed for tabletop placement and suits homeowners who want remote climate monitoring and comfort alerts on their phone.

Continuous monitoring with five-second updates

Measurements refresh every five seconds, giving a near real-time view of changing conditions rather than a single snapshot. Temperature and humidity history is stored in the cloud for up to six months and can be queried by day, month or half-year intervals, with export available for further analysis. Alerts trigger immediately when readings leave a user-defined comfort range. The sensor is not suited for installations that require wired power or direct Wi-Fi connectivity without a Zigbee hub.

Plastic tabletop unit with CR2477 battery

The white plastic housing measures 4.5 cm by 4.5 cm by 1.7 cm and weighs 0.04 kg, allowing discreet placement on any flat surface. A single CR2477 cell provides up to four years of operation based on SONOFF laboratory testing, reducing maintenance frequency. No mounting hardware is included, so the sensor remains portable and can be moved between rooms as needed.