Temperature and process controller
IMO Precision Controls Limited
What is a temperature controller?
A temperature controller is an instrument used to control temperature. The temperature controller takes an input from a temperature sensor and has an output that is connected to a control element, such as a heater or fan.
How do temperature controllers work?
To accurately control process temperature without extensive operator involvement, a temperature control system relies upon a controller, which accepts a temperature sensor such as a thermocouple or RTD as input. It then compares the actual temperature to the desired control temperature, or setpoint, and provides an output to a control element.
The controller is one part of the entire control system, and the whole system should be analysed in selecting the proper controller. The following items should be considered when selecting a controller:
1. Type of input sensor (thermocouple, RTD) and temperature
range
2. Type of output required (electromechanical relay, SSR,
analogue output)
3. Control algorithm needed (on/off, proportional, PID)
4. Number and type of outputs (heat, cool, alarm, limit)
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