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RTD Specifications
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© Copyright 2006 Pyromation, Inc., All Rights Reserved.
30-7
GEN-10
G
eneral
Two-Wire: Provides one connection to each end of the element. This construction is suitable where the resistance
of the lead wire may be considered as an additive constant in the circuit, and particularly where the changes in lead
resistance due to ambient temperature changes may be ignored.
Three-Wire: Provides one connection to one end of the element and two to the other end of the element. Connected
to an instrument designed to accept three wire input, suf cient compensation is usually achieved for leadwire resistance
and temperature change in leadwire resistance. This is the most commonly used con guration.
Four-Wire: Provides two connections to each end of the element to completely compensate for leadwire resistance
and temperature change in leadwire. This con guration is used where highly accurate temperature measurement is
vital.
WHITE
WHITE
GREEN
GREEN
RED
RED
BLACK
BLACK
WHITE
RED
WHITE
GREEN
RED
BLACK
WHITE
RED
RED
WHITE
GREEN
RED
RED
BLACK
BLACK
WHITE
WHITE
RED
RED
3 WIRE SINGLE
2 WIRE SINGLE
2 WIRE DUPLEX
3 WIRE DUPLEX
4 WIRE SINGLE
4 WIRE DUPLEX
Pyromation Standard RTD Element Speci cations
ELEMENT
MATERIAL
[1]
ELEMENT
TYPE
RESISTANCE
@ 0 °C
TEMPERATURE
COEFFICIENT
OPERATING
RANGE
[2]
AVAILABLE TOLERANCES @ 0 °C
±0.5%
±0.2%
±0.12% ±0.1%
±0.6%
±0.03% ±0.05%
Platinum
Thin Film
100 Ohm
=0.003 85 ºC
-1
(-70 to 550) °C
[-94 to 1022] °F
X
X
Platinum
Wire Wound
100 Ohm
=0.003 85 ºC
-1
(-200 to 600) °C
[-328 to 1112] °F
X
X
X
Platinum
Wire Wound
100 Ohm
=0.003 92 ºC
-1
(-200 to 600) °C
[-328 to 1112] °F
X
X
Platinum
Wire Wound
200 Ohm
=0.003 85 ºC
-1
(-200 to 600) °C
[-328 to 1112] °F
X
X
X
Platinum
Wire Wound
200 Ohm
=0.003 92 ºC
-1
(-200 to 600) °C
[-328 to 1112] °F
X
X
Platinum
Thin Film
500 Ohm
=0.003 85 ºC
-1
(-70 to 550) °C
[-94 to 1022] °F
X
Platinum
Thin Film
1000 Ohm
=0.003 85 ºC
-1
(-70 to 550) °C
[-94 to 1022] °F
X
Copper
[3]
Wire Wound
10 Ohm
=0.004 27 ºC
-1
(-101 to 204) °C
[-150 to 400] °F
X
Nickel
Wire Wound
120 Ohm
=0.006 72 ºC
-1
(-101 to 204) °C
[-150 to 400] °F
X
Nickel-Iron
Wire Wound
604 Ohm
=0.005 18 ºC
-1
(-101 to 204) °C
[-150 to 400] °F
X
[1]: Sensing elements of other materials, base values, and temperature coefficients are available upon request.
[2]: Stated operating ranges are typical values and are dependant upon the sensing element, element substrate, and the construction style of
the total sensor assembly. Sensor assemblies to exceed the stated limits may be available upon request.
[3]: Base resistance of 10 Ohm Copper RTD is measured at 25 ºC.