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Pt100 - Platinum Resistance Thermometers

Pt100 electrical resistance - ranging -220 to 750 degrees Celsius

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The PT100 has a resistance of 100 ohms at 0 °C and 138.5 ohms at 100 °C.

Temperature
(oC)

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Electrical Resistance
(Ω)
-220 10.41
-200 18.53
-180 27.05
-160 35.48
-140 43.80
-120 52.04
-100 60.20
-80 68.28
-60 76.28
-40 84.21
-30 88.17
-20 92.13
-10 96.07
0 100.00
10 103.90
20 107.79
30 111.67
40 115.54
50 119.40
60 123.24
80 130.89
100 138.50
120 146.06
140 153.57
160 161.04
180 168.47
200 175.84
220 183.17
240 190.46
260 197.70
280 204.88
300 212.03
320 219.13
340 226.18
360 233.19
380 240.15
400 247.06
420 253.93
440 260.75
460 267.52
480 274.25
500 280.93
520 287.57
540 294.16
560 300.70
580 307.20
600 313.65
620 320.05
640 326.41
660 332.72
700 345.21
750 360.55

Note! - there are also PT1000 sensors with resistance 1000 ohms at 0 °C.

The linearization equation for the Pt100 thermometer is

Rt = R0 (1 + A t + B t2 + C (t - 100) t3)              (1)

where

Rt = resistance at temperature t  (ohm)

R0 = resistance at temperature 0oC (ohm)

t = temperature (oC)

A = 3.9083 10–3

B = –5.775 10–7

C = –4.183 10–12 (for temperatures below 0oC)

C = 0 (for temperatures above 0 °C)

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