A temperature controller is a device used to maintain a desired temperature at a specified level.
The Simplest Example A temperature controller is a widely used thermostat found in houses. For example, a water heater uses a thermostat to control the temperature of the water and keep it at a specific commanded temperature. Temperature controllers are also used in ovens. When a temperature is set for an oven, a controller monitors
the actual temperature inside the oven.
When it falls below the set temperature, it sends a signal to activate the heater and raise the temperature back to the set point. Thermostats are also used in refrigerators. So if the temperature gets too high, a controller will take action to lower the temperature.
Industrial temperature controllers work similar to normal households. Applications A simple temperature controller allows the control of heating and cooling processes in industry or laboratory.
In a typical application, sensors measure actual temperature. This sensed temperature is constantly compared to a user set point. If the actual temperature deviates from the setpoint, the controller generates an output signal to activate other temperature control devices such as heating elements or cooling components to bring the temperature back to setpoint.
Ovens also use temperature controllers. When an oven temperature is set, a controller monitors the actual temperature inside the oven. If it falls below the set temperature, it sends a signal to the heater to bring it back up to temperature.
Temperature controllers are used in a variety of industries to manage manufacturing processes or operations. Some common applications of temperature controllers in industry include plastic extrusion and injection molding machines, thermoforming machines, packaging machines, food processing, food storage, and blood banks. The following is a brief description of some common industrial temperature control applications:
Controllers regulate temperature and/or process time to ensure optimal performance.
A Temperature Controller is a device that controls a heater or other piece of equipment by comparing a sensor signal to a set point and performing calculations based on the difference between those values.
Temperature controllers are required in any situation where a specific temperature must be kept stable. This can occur when an object is required to be heated, cooled, or both, and to maintain the target temperature (setpoint) in the face of changing environmental conditions. There are two basic types of temperature control: open loop and closed loop. The most basic form is the open loop, which uses continuous heating/cooling with no regard for the actual temperature output. It is similar to a car's internal heating system. On a cold day, you may need to crank up the heat to full blast to get the car to 75°. During warmer weather, however, the same setting would leave the inside of the car much warmer than the desired 75°.
Process controllers are classified into three types: on-off, proportional, and PID. The operator will be able to control the process using one of two types, depending on the system to be controlled. The most basic type of control device is an on-off temperature controller.