Temperature changes in the cooled medium are tracked by which control mechanism?

The thermostatic controller is specifically designed to monitor and manage temperature changes in cooling systems. It operates by using a temperature-sensitive element that responds to fluctuations in temperature. When the temperature of the cooled medium rises or falls beyond a predetermined set point, the thermostatic controller activates or deactivates heating or cooling equipment to maintain the desired temperature range.

This mechanism is critical in various applications, such as HVAC systems, refrigeration units, and other processes requiring precise temperature control. By effectively responding to temperature changes, the thermostatic controller ensures optimal performance and energy efficiency while preventing overheating or overcooling, which could potentially damage equipment or compromise the process being regulated.

Other options serve different purposes: pressure switches monitor changes in pressure, float switches are used to detect liquid levels, and relay systems control electrical circuits but do not directly measure or control temperature. Thus, the thermostatic controller is the most relevant and effective choice for tracking temperature changes in a cooled medium.