Temperature controllers work by sensing the temperature of the space or system that they are controlling without much intervention from the operator. In a temperature control system, a controller accepts the input received by the sensor or a thermocouple and compares the measured temperature to the desired output temperature known as set point. This output will then be utilized by the element to control the temperature. This set point can be balanced utilizing either a cooling system or a heater as per the difference between the actual and the desired temperatures. If the temperature is too high, the controller will activate the cooling system. If the temperature is too low, the controller will allow the heating system to continue further heating. A controller makes only a part of the entire control system, and in order to install the entire temperature control unit for a process, the entire system configuration needs to be thoroughly analyzed and assessed for its temperature controlling capacity.
There are a variety of different types of temperature controllers available on the market. The type of controller that you choose will depend on your specific needs. Some of the most common types of temperature controllers include on-off controller, proportional temperature controller, and PID type controller as detailed below:-
#1 – On-Off Type Temperature Controller: This type of temperature controller is the most basic type of controller where the output can either be turned on or off. It has a defined set point such that when temperature has risen to that particular point, the heater will be automatically switched off. The heater remains on until the temperature of the system is recorded below the set point. For continuity of the heating process, the process controller goes through cycling between on and off since the temperature goes up and down the set point. It is most suitable for processes where precise temperature control is not required or where the mass of the material to be heated is so large that any temperature change happens pretty slowly and gradually.
#2 – Proportional Temperature Controller: A proportional temperature controller is so designed to eliminate the process cycling that is associated with on-off temperature controllers. This type of controller controls the power being supplied to the heating element as the process temperature is about to reach its set point. This type of controller is extremely useful in processes where temperature needs to be kept stable.
#3 – PID Temperature Controller: A PID temperature controller is a device that is used to regulate temperature by controlling the amount of heat that is generated. The controller uses a feedback loop to compare the actual temperature to the desired temperature, and then adjusts the heat output accordingly. PID temperature controllers can be used in a wide variety of applications, such as keeping the temperature of an oven or a furnace at a set point. They are often used in industrial settings where precise temperature control is critical. PID temperature controllers work by constantly monitoring the temperature and making adjustments to the heat output as needed. This ensures that the temperature remains at the desired level, even if the conditions around the controller change.
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For more information on temperature controllers and to figure out which type of temperature controller will work best for your industrial process, you can seek help from the top notch industry experts at Heatcon who can surely be able to help you select the best temperature controller for your industry type.