What is Equivalent Micro-Geometry or EMG?
This is the simplest approach to determining leak tightness. The hypothesis is that there is a maximum size for a critical micro-geometry that will not allow fluids (liquid or vapor) to continuously leak out for given operating conditions and fluids. This essentially is the pinhole that allows unwanted leaks to occur, with leak flow rate exceeding product specifications. The idea is that EMGs will leak the same as the maximum allowed real life leaks as long as their operating conditions are the same. This is a leak test method independent of defining your leak tightness! The EMG is also a great method to validate your production leak test system, or to correlate between different production leak test systems. Controlled EMGs also known as calibrated leaks can be purchased from ATC. Review our Equivalent Channels and Equivalent Diameters to learn more.
