60
TEMPERATURE/RESISTANCE CHART
As the temperature rises at the thermistor block, the
resistance drops.
IMPORTANT
If the ohmmeter reads “OL,” check the scale
setting on the meter before assuming the
thermistor is bad.
SM50 Resistance Chart
Temperature of Thermistor Resistance
°C °F
K Ohms (x 1000)
15.6° - 21.1° 60° - 70°
15.31 - 11.88
21.1° - 26.7° 70° - 80°
11.88 - 9.29
26.7° - 32.2° 80° - 90°
9.29 - 7.33
32.2° - 37.8° 90° - 100°
7.33 - 5.82
37.8° - 43.3° 100° - 110°
5.82 - 4.66
43.3° - 48.9° 110° - 120°
4.66 - 3.75
48.9° - 54.4° 120° - 130°
3.75 - 3.05
54.4° - 60.0° 130° - 140°
3.05 - 2.49
60.0° - 65.6° 140° - 150°
2.49 - 2.04
65.6° - 71.1° 150° - 160°
2.04 - 1.68
71.1° - 76.7° 160° - 170°
1.68 - 1.40
76.7° - 82.2° 170° - 180°
1.40 - 1.17
82.2° - 87.8° 180° - 190°
1.17 - 0.98
87.8° - 93.3° 190° - 200°
0.98 - 0.82
93.3° - 98.9° 200° - 210°
0.82 - 0.70
100° 212°
0.73 - 0.62
(boiling water bath)
104.4° - 110.0° 220° - 230°
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