The sensor with a long cable сan be a good option to measure the temperature outside. The probe is weatherproof. The probe has a “wingnut” for screwing. The sensor with a long cable is also a good option if the iSocket unit is located close to the heating system, which may affect temperature measurements. A sensor with a cable will allow you to install the sensor far from the source of heating, and then you can measure the temperature at precisely the point you want: e.g. ceiling, floor or in the middle of room. This sensor can be used for measuring the temperature of water, but this is not recommended – please consider Temperature Sensor Pro for these purposes. For use with iSocket 3G and iSocket Environment Pro.