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M-4271/0707, pg. 22 of 26
G.
Gas K Factors
Gas
Chemical
Symbol
K Factor
Acetylene C
2
H
2
0.589
Air - 1.000
Argon Ar 1.438
Butane C
4
H
10
0.260
Carbon Dioxide CO
2
0.739
Deuterium D
2
1.000
Ethylene C
2
H
4
0.598
Freon 11 CCL
3
F 0.330
Freon 12 CCL
2
F
2
0.354
Freon 13 CCLF
3
0.385
Freon 14 CF
4
0.420
Freon 22 CHCLF
2
0.460
Germane GeH
4
0.570
Helium He 1.458
Hydrogen H
2
1.011
Krypton Kr 1.440
Methane CH
4
0.721
Neon Ne 1.443
Nitric Oxide NO 0.990
Nitrogen N
2
1.000
Nitrous Oxide N
2
O 0.710
Oxygen O
2
0.991
Ozone O
3
0.446
Propane C
3
H
8
0.383
Sulfur Dioxide SO
2
0.690
Xenon Xe 1.437
These K Factors are given for reference only and are not intended as a recommendation of
application suitability. Accuracy and response will be affected depending on the gas and
flow range. Check the compatibility of all wetted materials before using any gas other than
the calibration gas for the unit.