136
Appendix A
—
Moisture Conversion Table
Relative
Humidity at
20
ºC & 1 atm
Dew Point in
ºC at 1 atm
PPM on
volume basis
at 1 atm
PPM on weight
basis in air
Partial water
vapor pressure
in mbar
95
19.2
22390
13897
22.19
90
18.3
21187
13150
21.02
85
17.4
19987
12405
19.85
80
16.5
18788
11662
18.67
75
15.4
17594
10920
17.52
70
14.4
16402
10180
16.35
65
13.2
15212
9442
15.18
60
12
14026
8705
14.02
55
10.7
12842
7971
12.85
50
9.3
11661
7238
11.68
45
7.7
10483
6506
10.51
40
6
9307
5777
9.34
35
4.1
8134
5049
8.17
30
1.9
6964
4322
7.01
25
-0.5
5797
3598
5.84
20
-3.2
4632
2875
4.67
15
-6.6
3470
2154
3.5
10
-11.2
2311
1434
2.34
9
-12.4
2079
1290
2.1
8
-13.6
1848
1147
1.87
7
-15.1
1616
1003
1.63
6
-16.8
1385
860
1.4
5
-18.7
1154
716
1.17
4
-21
923
573
0.934
3
-24
692
430
0.701
2
-28
461
286
0.467
1
-32.6
285
177
0.288
Moisture Conversion Table