Differential leak testing has very good sensitivity and can be easily integrated into most automated systems.
Compressed air serves as the test medium, resulting in relatively low operating costs and freedom from contamination.
Low viscosity air quickly penetrates porosity or other sources of leakage. Cleaning and drying of previously tested parts, as well as corrosion protection, are not required. Maintenance of the test system is minimal.

As for all pressure leak test systems leak free test fixtures and related components are required.