Specialty Gases & Equipment
Dew Point vs Parts Per Million*

oF

oC

ppm

-4

-20

1,020

-5

-20.6

970

-6

-21.1

920

-7

-21.7

870

-8

-22.2

820

-9

-22.8

780

-10

-23.3

740

-11

-23.9

700

-12

-24.4

660

-13

-25

630

-14

-25.6

590

-15

-26.1

560

-16

-26.7

530

-17

-27.2

500

-18

-27.8

475

-19

-28.4

448

-20

-28.9

422

-21

-29.5

400

-22

-30

378

-23

-30.6

358

-24

-31.1

338

-25

-31.7

317

-26

-32.2

300

-27

-32.8

283

-28

-33.3

265

-29

-33.9

250

-30

-34.4

235

-31

-35

222

-32

-35.6

210

-33

-36.1

196

-34

-36.7

185

-35

-37.2

174

-36

-37.8

164

-37

-38.3

153

-38

-38.9

144

oF

oC

ppm

-39

-39.4

136

-40

-40

128

-41

-40.6

119

-42

-41.1

113

-43

-41.7

105

-44

-42.2

98

-45

-42.8

92

-46

-43

87

-47

-44

82

-48

-44

76

-49

-45

72

-50

-46

67

-51

-46

62

-52

-47

59

-53

-47

55

-54

-48

51

-55

-48

48

-56

-49

44.6

-57

-49

41.8

-58

-50

39

-59

-51

36.5

-60

-51

34

-61

-52

31.7

-62

-52

29.4

-63

-53

27.5

-64

-53

25.6

-65

-54

23.6

-66

-54

22.1

-67

-55

20.6

-68

-56

19.2

-69

-56

17.9

-70

-57

16.6

-71

-57

15.4

-72

-58

14.3

-73

-58

13.3

oF

oC

ppm

-74

-59

12

-75

-59

11.4

-76

-60

10.5

-77

-61

9.8

-78

-61

9.1

-79

-62

8.4

-80

-62

7.8

-81

-63

7.2

-82

-63

6.6

-83

-64

6.2

-84

-64

5.7

-85

-65

5.3

-86

-66

4.78

-87

-66

4.5

-88

-67

4.15

-89

-67

3.84

-90

-68

3.53

-91

-68

3.28

-92

-69

3

-93

-69

2.76

-94

-70

2.54

-95

-71

2.35

-96

-71

2.15

-97

-72

1.96

-98

-72

1.81

-99

-73

1.66

-100

-73

1.53

-101

-74

1.4

-102

-74

1.29

-103

-75

1.18

-104

-76

1.08

-105

-76

1

-110

-79

0.63

-120

-84

0.25

-130

-90

0.1

* @ 760 Torr