Temperature control is widely used in various processes. These processes, in a large industrial plant, frequently include non-linearity, interference, dead time, and external disturbances, among others. Conventional approaches usually do not result in satisfactory temperature control. Thermometrics manufactures RTD averaging sensors in lengths of 25' to obtain a temperature profile of the air moving through an air duct. This sensor is available in 100 ohm, 500 ohm and 1000 ohm and is customed manufactured for your specific application. Example, your semi conductor chip manufacturing wants the room to remain stable at 25 Celsius. We build the sensor specifically to obtain a DIN Class A accuracy (+/- 0.2ēC) at that temperature point. These sensors are compatible with most air conditioning controllers in use today.