Why Helium Beats Other Tracers
Small atomic size → detects 10⁻⁹ mbar·L/s leaks.
Non-toxic vs. SF₆ or HFCs.
Industry Applications
SpaceX: Falcon rocket fuel lines.
Toyota: Hydrogen fuel cell seals.
Boeing: Aircraft cabin pressure systems.
Purity Requirements (ASTM E908-18)
99.995% to prevent false positives.
Hydrocarbon-free for EV battery testing.
Testing Methods Compared
Sniffer probes vs. vacuum chamber testing.
Mass spectrometer sensitivity levels.
Cost Optimization
Helium recovery systems (90% reuse).
Nitrogen/helium mix for large-volume tests.
Post time: Jul-08-2025