Measuring Air Leakage: Test for Watertight Seal

[curiouskk]

I was not sure where to post this so decided to start here. If there is a better section please let me know...

If you put a sealed device on a scale and place in an air tight box then fill with air pressure would the weight change of the device if there was a leak? I am trying to do a test to check watertight seal without water. Thanks in advance.

 

[rumborak]

Just to understand this correctly, you have a box in a box, and the inner box leaks gas to the outer box?

Since no material gets removed from the system that is being weighed (both boxes), the weight will stay the same.

 

[NascentOxygen]

I am trying to do a test to check watertight seal without water.

Assuming the test can be completed within a few hours and not require whole days, could you instead place the pressurised watertight box inside a balloon, then watch to see whether the balloon inflates? Start with the balloon deflated...

 

[russ_watters]

This method concerns me because one reason water is used rather than air is pressurized air is explosive and pressurized water is not.