Measured or otherwise detected, and the passage of heat energy into or out of the space is adjusted to achieve a desired average temperature.
WHAT IT IS. An air conditioner can change the temperature, humidity or general quality of the air. More specifically, an air conditioner makes your home cooler, by drawing heat energy out of the house and transferring that heat to the outdoors, then replacing the air inside your home with cooler air.  Intake Air Temperature (IAT). The Intake Air Temperature (IAT) sensor resistance changes in response to the intake air temperature. The sensor resistance decreases as the surrounding air temperature increases. This provides a signal to the PCM, indicating the temperature of the incoming air charge.  1 The Johnson digital controller is used to control the temperature of a refrigerator, or similar cooling or heating device. 2  Enter your desired temperature, called set point, and how tightly you want your temperature maintained, called differential, and let the controller do the rest.  Residential. It’s your air, it’s your temperature, at your control. 1  Heating and air conditioning systems that save energy, save money, and provide total home comfort. 2  Service agreements for new or existing heating and air conditioning systems. Commercial. Air Temperature Control has all of the equipment and resources to meet all of your commercial needs. 1  ATC can balance your existing heating and air conditioning system or custom fit your business with a new system. 2  Customized maintenance agreements for all of your heating and air conditioning systems. Temperature control is a process in which change of temperature of a space (and objects collectively there within) is measured or otherwise detected, and the passage of heat energy into or out of the space is adjusted to achieve a desired average temperature. A home thermostat is an example of a closed control loop: It constantly assesses the current room temperature and controls a heater and/or air conditioner to increase or decrease the temperature according to user-defined setting(s). Ambient Air Temperature Sensor. The ambient (ATC) or outside air temperature sensor is an (NTC) negative temperature coefficient sensor that informs the semiautomatic/automatic temperature control system of outside air temperature. The NTC sensor’s resistance decreases as the outside air temperature increases. The computer uses this input, along with other in-car temperature sensors to control temperature and blower speed. When there’s a problem with this sensor, performance will suffer and the compressor’s clutch may not engage. Automotive air conditioning systems use NTC sensors to monitor air temperature. The In Car Temperature sensor (ICTS) is an NTC that monitors the air temperature of the passenger compartment. The ambient temperature sensor (ATS) monitors the air temperature outside of the vehicle. A mass (air) flow sensor (MAF) is used to find out the mass flowrate of air entering a fuel-injected internal combustion engine. The air mass information is necessary for the engine control unit (ECU) to balance and deliver the correct fuel mass to the engine. Air changes its density as it expands and contracts with temperature and pressure. The Benefits of Supply Air Temperature Control in the Data Centre 2 Future Facilities Ltd © 2010 adoption. With this in mind, at present, controlling the supply air temperature with a sensor in the supply air stream is the only viable alternative to return air control. The Benefits of Supply Air Temperature Control in the Data Centre 7 Future Facilities Ltd © 2010 In the last example the data centre is at the design capacity with all the cabinets fully populated (Figure 11).
https://www.trane.com/residential/en/resources/hvac-basics/how-does-an-air-conditioner-work.html http://www.freeautomechanic.com/iat-intake-air-temperature.html http://www.kegerators.com/temperature-controllers.php http://www.airtemperaturecontrol.net/ https://en.wikipedia.org/wiki/Temperature_control http://www.freeasestudyguides.com/ac-ambient-air-temperature-sensor.html https://en.wikipedia.org/wiki/Mass_flow_sensor http://www.futurefacilities.com/media/whitepapers/SupplyControl/SupplyControl.pdf
what does the air temperature controller do