Shelly Temperature Sensor (3 m) is a DS18B20 digital temperature probe for use with the Shelly Plus Add-on. Its three-metre cable provides extra separation between the host Shelly device and the point being measured, which is useful where the probe needs to reach pipework, equipment or another remote temperature location.
Shelly lists the probe for precise temperature measurement with the Plus Add-on. It is a wired accessory and does not operate independently; the compatible host device provides the smart-home connection and automation functions.