A predetermined mixture of 2 or more gases in which each component is measured to extreme accuracy and its contents certified. It is normally used to standardize and assure the accuracy of highly sensitive laboratory equipment.
NSN 4140-01-419-5976
NSN 5935-00-098-9947
NSN 5915-00-239-0716
NSN 5990-00-181-2220
NSN 4140-00-172-1804
NSN 5925-00-297-8821
NSN 5915-01-088-2033
NSN 5920-01-276-5582
NSN 5998-01-175-0967
NSN 6645-01-433-6999
NSN 5996-01-493-7962
NSN 5910-01-136-3550