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RTD Tolerances, Classes and Comparisons


Platinum RTD Tolerance Values

       
Temperature C

Resistance Value

Tolerance DIN-IEC-761

Industrial Tolerance Class C
C ()

Class A
C()
Class B
C()
-200
-100
0
100
200
18.49
60.25
100.00
138.50
175.84
0.55-(0.24)
0.35-(0.14)
0.15-(0.06)
0.35-(0.13)
0.55-(0.20)
1.3-(0.56)
0.8-(0.32)
0.3-(0.12)
0.8-(0.30)
1.3-(0.48)
2.27
1.77
1.27
1.77
2.27
(1.15)
(0.71)
(0.50)
(0.67)
(0.83)
300
400
500
600
650
212.02
247.04
280.90
313.59
329.51
0.75-(0.27)
0.95-(0.33)
1.15-(0.38)
1.35-(0.43)
1.45-(0.46)
1.8-(0.64)
2.3-(0.79)
2.8-(0.93)
3.3-(1.06)
3.6-(1.13)
2.77
3.27
3.77
4.27
4.52
(0.98)
(1.10)
(1.22)
(1.32)
(1.36)


RTD Tolerance Class Definitions

DIN class A: (0.15 + 0.002 |t|C Where t is the actual temperature, in C, of the platinum elements.
DIN class B: (0.30 + 0.005 |t|C
DIN class C: (1.27 + 0.005 |t|C

RTD Resistance Wire Comparisons

Element
Metal
Temperature Range Benefits Base Resistance TCR (//C)
Platinum

-436 to 1562F
(-260 to 850C)
Best stability,
Good linearity
100 at 0C

0.00385 (DIN-IEC-761),
0.003916 (JIS 1604-1981)
Copper

-148 to 500F
(-100 to 260C)
Best linearity

10 at 25C

0.00427

Nickel

-148 to 500F
(-100 to 260C)
Low cost,
High Sensitivity
120 at 0 C

0.00672


PDF File RTD Information


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