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RTD Tolerances, Classes and Comparisons

Platinum RTD Tolerance Values
       
Temperature ºC

Resistance Value

Tolerance DIN-IEC-761

Industrial Tolerance Class C
ºC ()
Class A
ºC()		 Class B
ºC()
-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|ºC Where t is the actual temperature, in ºC, of the platinum elements.
DIN class B: ±(0.30 + 0.005 |t|ºC
DIN class C: ±(1.27 + 0.005 |t|ºC

RTD Resistance Wire Comparisons
Element
Metal		 Temperature Range Benefits Base Resistance TCR (//ºC)
Platinum
-436 to 1562ºF
(-260 to 850ºC)
Best stability,
Good linearity
100 at 0ºC
0.00385 (DIN-IEC-761),
0.003916 (JIS 1604-1981)
Copper
-148 to 500ºF
(-100 to 260ºC)
Best linearity
10 at 25ºC
0.00427
Nickel
-148 to 500ºF
(-100 to 260ºC)
Low cost,
High Sensitivity
120 at 0º C
0.00672

PDF File RTD Information


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