Appendix B.Thermistor Temperature Derivation

3kΩ Thermistor Resistance

Thermistor Types:

YSI 44005, Dale #1C3001–B3, Alpha #13A3001–B3

Honeywell 192–302LET–A01

Resistance to Temperature Equation:

T =

1

  273.15

A+B(LnR)+C(LnR3)

Equation 5: 3kΩ Thermistor Resistance

Where:

T = Temperature in °C

LnR = Natural Log of Thermistor Resistance

A = 1.4051 x 10–3 

B = 2.369 x 10–4 

C = 1.019 x 10–7

Note: Coefficients calculated over the –50 to +150 °C span.

Ohms

Temp

201.1K

–50

187.3K

–49

174.5K

–4f8

162.7K

–47

151.7K

–46

141.6K

–45

132.2K

–44

123.5K

–43

115.4K

–42

107.9K

–41

101.0K

–40

94.48K

–39

88.46K

–38

82.87K

–37

77.66K

–36

72.81K

–35

68.30K

–34

64.09K

–33

60.17K

–32

56.51K

–31

53.10K

–30

49.91K

–29

46.94K

–28

44.16K

–27

41.56K

–26

39.13K

–25

36.86K

–24

34.73K

–23

32.74K

–22

30.87K

–21

29.13K

–20

27.49K

–19

25.95K

–18

24.51K

–17

23.16K

–16

21.89K

–15

20.70K

–14

19.58K

–13

18.52K

–12

17.53K

–11

16.60K

–10

15.72K

–9

14.90K

–8

14.12K

–7

13.39K

–6

12.70K

–5

12.05K

–4

11.44K

–3

10.86K

–2

10.31K

–1

9796

0

9310

1

8851

2

8417

3

8006

4

7618

5

7252

6

6905

7

6576

8

6265

9

5971

10

5692

11

5427

12

5177

13

4939

14

4714

15

4500

16

4297

17

4105

18

3922

19

3748

20

3583

21

3426

22

3277

23

3135

24

3000

25

2872

26

2750

27

2633

28

2523

29

2417

30

2317

31

2221

32

2130

33

2042

34

1959

35

1880

36

1805

37

1733

38

1664

39

1598

40

1535

41

1475

42

1418

43

1363

44

1310

45

1260

46

1212

47

1167

48

1123

49

1081

50

1040

51

1002

52

965.0

53

929.6

54

895.8

55

863.3

56

832.2

57

802.3

58

773.7

59

746.3

60

719.9

61

694.7

62

670.4

63

647.1

64

624.7

65

603.3

66

582.6

67

562.8

68

543.7

69

525.4

70

507.8

71

490.9

72

474.7

73

459.0

74

444.0

75

429.5

76

415.6

77

402.2

78

389.3

79

376.9

80

364.9

81

353.4

82

342.2

83

331.5

84

321.2

85

311.3

86

301.7

87

292.4

88

283.5

89

274.9

90

266.6

91

258.6

92

250.9

93

243.4

94

236.2

95

229.3

96

222.6

97

216.1

98

209.8

99

203.8

100

197.9

101

192.2

102

186.8

103

181.5

104

176.4

105

171.4

106

166.7

107

162.0

108

157.6

109

153.2

110

149.0

111

145.0

112

141.1

113

137.2

114

133.6

115

130.0

116

126.5

117

123.2

118

119.9

119

116.8

120

113.8

121

110.8

122

107.9

123

105.2

124

102.5

125

99.9

126

97.3

127

94.9

128

92.5

129

90.2

130

87.9

131

85.7

132

83.6

133

81.6

134

79.6

135

77.6

136

75.8

137

73.9

138

72.2

139

70.4

140

68.8

141

67.1

142

65.5

143

64.0

144

62.5

145

61.1

146

59.6

147

58.3

148

56.8

149

55.6

150

table 5: 3KΩ Thermistor Resistance