>It's as binary as IT Yup, it either leaks or it doesn't. IOW in the case of helium leak testing, it either leaks an unacceptable amount or it leaks an accept

>It's as binary as IT Yup, it either leaks or it doesn't. IOW in the case of helium leak testing, it either leaks an unacceptable amount or it leaks an acceptable amount. For higher pressures or stronger vacuums there's always this: https://products.swagelok.com/en/all-products/fittings/c/100 https://products.swagelok.com/en/all-products/fittings/c/100? https://products.swagelok.com/en/all-products/valves/c/200 https://products.swagelok.com/en/all-products/valves/c/200? For things like aerospace or energy.