A good friend of mine made a leak checker from scrap parts while I was working at a university lab. It was just for a UHV system (no cryo). I wish I still wor

A good friend of mine made a leak checker from scrap parts while I was working at a university lab. It was just for a UHV system (no cryo). I wish I still worked with him. The whizz sound leak checkers make is good fun.