Answer :
Final answer:
Heated diode leak detectors are better than corona discharge detectors because they are more specific in the types of gases they react to, reducing the chance of false alarms. They also have a greater detection range for coolant. It’s incorrect to say that they use infrared lights in detection.
Explanation:
Heated diode leak detectors provide several advantages over corona discharge leak detectors. First and foremost, they are less prone to false alarms. This is because they specifically react to halogen gas typically seen in refrigerants, making them less likely to misinterpret the presence of other gases as leaks.
Additionally, heated diode leak detectors typically have a greater detection range for the amounts of coolant. This makes them more suitable for detecting small leaks or in circumstances where multiple small leaks could be present.
The statement that heated diode leak detectors use infrared lights in leak detection is incorrect. Heated diode technology works by heating a diode that triggers a reaction when it comes into contact with halogen-based refrigerants, not by using infrared light.
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Final answer:
Heated diode leak detectors are better than corona discharge detectors because they are much less likely to give false alarms and can detect a wider range of coolant amounts. However, they can be more expensive to replace, and they do not use infrared technology in leak detection. So options (A) and (C) are correct.
Explanation:
The question asks why heated diode leak detectors are better than corona discharge leak detectors. The advantages of heated diode leak detectors primarily revolve around their precision and efficiency. To start with, option A is correct as heated diode leak detectors are less likely to give false alarms. This is because they specifically respond to the halogenated refrigerants used in most cooling systems.
Option C is also true as heated diode leak detectors can detect a wider range of coolant amounts, which makes them much more reliable. Heating the diode increases its sensitivity, allowing even minor leaks to be detected.
Contrary to option B, heated diodes can be more expensive to replace because of their advanced technology. Option D is incorrect because infrared technology is a different kind of leak detection method and is not used in heated diode detectors.
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