In a refrigeration system, what is the purpose of using a halide torch?

The primary purpose of using a halide torch in a refrigeration system is to check for leaks by detecting the presence of refrigerant. Halide torches are designed to identify halogenated refrigerants, which are often used in modern cooling systems. When the torch is heated and brought close to a leak, the refrigerant gas reacts with the flame, changing its color, which indicates the presence of the refrigerant. This is a quick and effective method to ensure the integrity of the system and to prevent refrigerant loss, which can lead to performance issues and environmental harm.

The other options do not accurately describe the function of a halide torch; measuring pressure and adjusting refrigerant levels involve different tools and methods, while cooling the compressor is not a function attributed to the use of a halide torch.