Looking to expand your Plugwise network to do more than just monitor appliance energy consumption? Do so with the Sense Temperature and Air Humidity Sensor from Plugwise. This sensor will measure and track the temperature and humidity of the air in the given room it is in and transmit the data for analyzing over the Plugwise ZigBee wireless network. When installing the sensor it is important to do so within 10 meters (32 feet) of an installed Circle because the Sense will send its data to it for transmitting to the network. The sensor has a temperature measuring range of 0 to 60°C (32 to 140°F) and air humidity tracking range of 5 to 95% RH. The Temperature and Air Humidity Sensor is powered by 1 AA battery which is included with purchase. It is important to note that the Sense is an accessory to the Plugwise network and requires it to be already installed for proper use.