High School

Which type of leak detector works by drawing the vapor into the system and heating it?

A. Helium leak detector
B. Electronic leak detector
C. Ultrasonic leak tester
D. Fluorescent leak detector

Answer :

Final answer:

A Helium leak detector works by injecting gaseous helium into the system and using a heated filament to ionize helium atoms, which, when detected by a mass spectrometer, indicate a leak. So the correct option is: a) Helium leak detector

Explanation:

The type of leak detector that works by drawing the vapor into the system and heating it is the Helium leak detector. This detection method involves injecting a small amount of gaseous helium into a compartment of the system, such as a dilution refrigerator. An adjacent compartment is then connected to a high-vacuum pump with a mass spectrometer attached. A heated filament ionizes any helium atoms evacuated by the pump, and the detection of these ions by the spectrometer indicates a leak between the two compartments.