When using a halide torch detector to find escaping refrigerant, what color does the flame turn?

When using a halide torch detector to identify escaping refrigerant, the flame turns green upon contact with refrigerant gases. This characteristic response is due to the presence of halogen compounds in the refrigerant, which react with the flame to produce the distinctive green color.

Halide torches, often utilized in refrigeration and HVAC applications, are designed specifically to detect the presence of halogenated refrigerants. When halogen atoms in the refrigerants interact with the flame, they emit light in the green spectrum, making it easy for technicians to visually identify leaks. This green flame serves as a reliable indicator that confirms the existence of halogenated refrigerants in the vicinity, thereby enabling appropriate corrective measures.

Other colors like blue, red, and yellow are not indicative of refrigerant presence in this context and do not produce the necessary response to signal a leak when using a halide torch. Therefore, recognizing the green flame as the correct answer is essential for understanding the functional properties of halide torch detectors in detecting refrigerants.