Temperature controllers precisely regulate these operations to ensure a high quality product output. In the packaging world, machinery equipped with seal bars, glue applicators, hot melt functions, shrink wrap tunnels or label applicators must operate at designated temperatures and process time lengths. Temperature controllers are used in ovens and in heat-treating applications within furnaces, ceramic kilns, boilers, and heat exchangers. The following is a brief overview of some common temperature control applications in industry: Some common uses for temperature controllers in industry include plastic extrusion and injection molding machines, thermo-forming machines, packaging machines, food processing, food storage, and blood banks. Temperature controllers are used in a wide variety of industries to manage manufacturing processes or operations. When the actual temperature deviates from the setpoint, the controller generates an output signal to activate other temperature regulating devices such as heating elements or refrigeration components to bring the temperature back to the setpoint. This sensed temperature is constantly compared to a user setpoint. In a typical application, sensors measure the actual temperature. A basic temperature controller provides control of industrial or laboratory heating and cooling processes. Temperature controllers in industry work much the same way they do in common household applications. So if the temperature gets too high, a controller initiates an action to bring the temperature down. Thermostats are also used in refrigerators. If it falls below the set temperature, it sends a signal to activate the heater to raise the temperature back to the setpoint. When a temperature is set for an oven, a controller monitors the actual temperature inside of the oven. Temperature controllers are also used in ovens. For instance, a hot water heater uses a thermostat to control the temperature of the water and maintain it at a certain commanded temperature. The simplest example of a temperature controller is a common thermostat found in homes. Closed loop control block diagram Introduction to Temperature ControllersĪ temperature controller is a device used to hold a desired temperature at a specified value.
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