What is the primary function of a thermocouple in HVAC metering?

The primary function of a thermocouple in HVAC metering is to measure the temperature of air or fluid. Thermocouples consist of two different types of metal wires joined at one end, which produce a voltage that is proportional to the temperature difference between the junction (where the wires are connected) and the free ends of the wires. This capability makes thermocouples widely used in various HVAC applications to monitor and control temperature effectively.

For example, in an HVAC system, knowing the temperature of the air entering and exiting coils is critical for maintaining comfort and system efficiency. Accurate temperature readings help ensure that heating and cooling equipment operates within optimal parameters. Thus, thermocouples play a crucial role in enabling HVAC systems to maintain desired temperature levels efficiently, making them essential for effective HVAC metering and management.