The Helium Accumulation Leak Test Method is often used when the sensitivity of the helium hard vacuum method is not required. Typical leak rates for this method are 10-4 atmcc/sec and larger. Normally, this method is used to measure out-leakage of a part filled with helium and placed in an accumulation test chamber. The test part can be pre-filled with helium tracer gas and sealed or it can be filled with helium while inside the accumulation test chamber. Additionally, for larger parts with only a few potential locations for leaks (e.g, an automotive A/C hose), small clam shell accumulation chambers can be strategically placed over the locations for site-specific leak testing.
Check out the products and customer project examples listed below that use the helium accumulation test method.