The G-400 is a Fine and Gross leak pressurization system that is compatible with both helium and fluorocarbons. This preconditioning system is designed to automatically pressurize test samples with helium or fluorocarbons.

Upon completion of the preconditioning phase, the test sample is placed inside a "bubble tester" for gross leak testing. When detecting fine leaks a helium mass spectrometer is used

The bubble tester is designed to meet the MIL-STD-883 requirements for gross leak testing. The G-254A bubble tester is a medium sized system providing a usable tray area of 5-7/8" x 13-7/8". Other standard models are available for smaller and larger capacity requirements