KB003895: What is the Replacement Membrane Part Number for the Nitrogen Generators? - General LC/MS 

There are two versions of the P/N 5183-2003 Nitrogen Gas Generator which doesn't Require Power (Old and New types) and two versions of the P/N 5183-2004 Nitrogen Gas Generator with Oxygen monitor, 120/220V (Old and New types).The replacement membranes for the two versions are different. The original versions of 5183-2003 and 5183-2004 had a single tower membrane and the part number is 5950-5207. The new versions of 5183-2003 and 5183-2004 have a dual tower membrane and the part number is 5188-5376.