Inquiry (采购产品): Leak If I am checking for leak rates in the 10 -7 or 10 -8 range, what other trace can can I use to detect a leak besides helium? I am filling a pressure bottle with argon at 4000psi. Mike Goodin ARC Automotive, Inc. **** Hidden Message ***** mike goodin 37931 USA Company: ARC Automotive, Inc. E-mail: mgoodin@arcautomotive.com **** Hidden Message ***** mgoodin@arcautomotive.com