Where is the sensor located on a thermostatic expansion valve?

The sensor of a thermostatic expansion valve is located on the outlet of the evaporator. This placement is crucial because the function of the sensor is to detect the temperature of the refrigerant as it leaves the evaporator. By monitoring the temperature at this point, the valve can adjust the flow of refrigerant into the evaporator, ensuring that the heat exchange process remains efficient and that the evaporator does not become overly flooded or starved. This helps maintain optimal cooling performance and system efficiency.

The position of the sensor on the outlet of the evaporator allows for precise control of the refrigerant flow based on the actual thermal load being experienced in the cooling system. If the temperature is too low, the valve will restrict refrigerant flow, while if the temperature is too high, the valve opens to allow more refrigerant to ensure adequate heat absorption.