Temperature sensors and transmitters are the instruments at the heart of indoor air management in buildings. Temperature is the first air parameter to be controlled and the first target for the tuning of an air conditioning system. 

Within a building, top-of-the-range fixed thermometers can be found in a number of key locations within an air-conditioning system, from an air-handling unit or boiler, right through to the rooms supplied by the air-conditioning and/or heating systems, and sometimes even outside to optimise the energy efficiency and power consumption of the air-conditioning or heating systems.