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jimmyjewfish
19-11-2012, 03:55 AM
hi everyone just need help need a chart reading with temp to ohms to test outdoor coil sensors and indoor

Tesla
19-11-2012, 06:01 AM
Hi Jimmy
http://www.datasheetarchive.com/temperature+to+resistance+of+10k+ntc+resistor-datasheet.html should help point you in the right direction. Most sensors used are Thermistors NTC and usually 10k but can come in like 2k 5k 20k 100k etc. If you measure your sensor at around 25degC you should get an idea of how many k it is.
Most as suppliers of controls suppliers will charge from $25 to $250 for a sensor which you can buy from jaycar electronics for less than $5.

martinw58
19-11-2012, 06:50 PM
Values for various popular resistance thermometers


Temperature
in C

Pt100
in Ω (http://en.wikipedia.org/wiki/Ohm_(unit))

Pt1000
in Ω

PTC (http://en.wikipedia.org/wiki/Positive_temperature_coefficient)
in Ω

NTC (http://en.wikipedia.org/wiki/Negative_temperature_coefficient)
in Ω

NTC
in Ω

NTC
in Ω

NTC
in Ω

NTC
in Ω




Typ: 404

Typ: 501

Typ: 201

Typ: 101

Typ: 102

Typ: 103

Typ: 104

Typ: 105



−50

80.31

803.1

1032








−45

82.29

822.9

1084








−40

84.27

842.7

1135



50475





−35

86.25

862.5

1191



36405





−30

88.22

882.2

1246



26550





−25

90.19

901.9

1306


26083

19560





−20

92.16

921.6

1366


19414

14560





−15

94.12

941.2

1430


14596

10943





−10

96.09

960.9

1493


11066

8299





−5

98.04

980.4

1561

31389

8466






0

100.00

1000.0

1628

23868

6536






5

101.95

1019.5

1700

18299

5078






10

103.90

1039.0

1771

14130

3986






15

105.85

1058.5

1847

10998







20

107.79

1077.9

1922

8618







25

109.73

1097.3

2000

6800



15000




30

111.67

1116.7

2080

5401



11933




35

113.61

1136.1

2162

4317



9522




40

115.54

1155.4

2244

3471



7657




45

117.47

1174.7

2330




6194




50

119.40

1194.0

2415




5039




55

121.32

1213.2

2505




4299

27475



60

123.24

1232.4

2595




3756

22590



65

125.16

1251.6

2689





18668



70

127.07

1270.7

2782





15052



75

128.98

1289.8

2880





12932



80

130.89

1308.9

2977





10837



85

132.80

1328.0

3079





9121



90

134.70

1347.0

3180





7708



95

136.60

1366.0

3285





6539



100

138.50

1385.0

3390








105

140.39

1403.9









110

142.29

1422.9









150

157.31

1573.1









200

175.84

1758.4