Leak Testing is used to detect through leaks using one of the four major LT techniques: Bubble, Pressure Change, Halogen Diode and Mass Spectrometer Testing.
- Bubble Leak Testing relies on the visual detection of a gas (usually air) leaking from a pressurized system; Pressure Change Leak Testing can be performed on closed systems only– detection of a leak is done by either pressurizing the system or pulling a vacuum then monitoring the pressure.
- Halogen Diode Leak Testing is done by pressurizing a system with a mixture of air and a halogen-based tracer gas– after a set period of time, a halogen diode detection unit, or “sniffer”, is used to locate leaks.
- Mass Spectrometer Leak Testing can be done by pressurizing the test part with helium or a helium/air mixture within a test chamber then surveying the surfaces using a sniffer, which sends an air sample back to the spectrometer.
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