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71
Temperature vs. Resistance Data
SunTouch systems use 10k
Ωαττ thermistor sensors. When the solar sensor is disconnected from the
SunTouch system, the sensor will read 10k
Ω at 77º F (25ºC). Refer to the following table for the resistance at other temperatures. An accurate reading should give a temperature setting that is accurate to ±0.2º C from 0 to 70 º C.
Temperature Resistance Temperature Resistance
o
C o
F
Ω
o
C o
F
Ω
7
10
13
15
-1
0
2
4.7
5
-9
-10
-7
-5
-4
-26
-25
-23
-21
-20
-18
-15
-12
45
50
55
59
30
32
35
40
41
15
14
20
23
25
-5
-4
0
-15
-13
-10
5
10
139,300
130,300
118,000
100,200
97,000
85,350
72,910
62,480
53,640
55,300
46,230
42,300
39,910
34,560
32,600
30,000
26,100
25,400
22,760
19,900
17,440
15,700
110
113
120
122
125
130
131
135
90
95
100
104
105
75
77
80
60
65
70
85
86
43
45
49
50
52
54
55
57
32
35
38
40
41
24
25
27
16
18
21
29
30
4,663
4,367
3,757
3,602
3,381
3,047
2,985
2,750
15,310
13,480
11,880
10,500
10,000
9,298
8,250
8,056
7,331
6,530
5,826
5,326
5,209
SunTouch Solar, Pool and Spa Control System Installation and User’s Guide
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