If I say to you that a leakage rate of 10 -4 std. Is the equivalent of the loss of 1 cc. of air over 3 hours, this sounds like a large leakage rate. However, if I say that it is the equivalent of losing a pound of freon over 27 years, you will probably think the leakage quite small. 320 years Equal in importance to an understanding and uniformity of Leak Detection standards is an understanding of the leakage testing products. A multitude of Leak Detection and leakage measurement devices exist.
Some devices are pneumatic.
Some are electronic. Some are chemical. Each device has advantages and disadvantages. To use any method effectively, a careful analysis of the device is necessary. The device I will attempt to analyze today is one form of chemical leakage testing.