Nest Temperature Sensor (2nd gen) vs X-Sense STH0B Smart Thermometer Hygrometer

The X-Sense STH0B Smart Thermometer Hygrometer is the better monitor, with humidity sensing, alerts, history and CSV export, plus Alexa and Home Assistant support. The Nest Temperature Sensor (2nd gen) is only worth buying to make an existing Nest Thermostat prioritize a specific room.

The Nest Temperature Sensor (2nd gen) is a thermostat accessory that changes which room the thermostat reads, while the X-Sense STH0B Smart Thermometer Hygrometer is a standalone temperature and humidity sensor with its own alerts and history. Neither works without its companion device.

Yes. The X-Sense STH0B Smart Thermometer Hygrometer needs an X-Sense SBS50 base station, since it has no Wi-Fi of its own, and the Nest Temperature Sensor (2nd gen) needs a compatible Nest Thermostat. Both are sold separately from those companions.

No. The X-Sense STH0B Smart Thermometer Hygrometer supports Alexa voice queries and Home Assistant through the community X-Sense integration, but it has no Google Home, Apple Home, SmartThings or Matter support, and neither does its base station.

Existing Nest Thermostat owners with an unevenly heated or cooled home who want the system to follow a bedroom, nursery or far room, and who do not need humidity, alerts or history.

Households already running an X-Sense SBS50 base station that want to add temperature and humidity monitoring with alerts and exportable history, especially for garages, greenhouses, cabins and other spots far from the router.