Radio sensors for the typical level of pollution found in residential, office, and hotel spaces. Primarily used in renovation projects or for expanding heating systems. Radio room temperature sensor for measuring and adjusting room temperature. When used with alre radio actuators and the b@home gateway, it enables individual room temperature control. The sensor can also be connected directly to the actuators without the b@home gateway to achieve individual room control and trigger a temperature reduction of 4K with the switch. A necessary battery replacement will be indicated on the sensor shortly.