106 / 192
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Thermocouple and
Extension'Wi.re
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Gauge
Temperature
Limlts;','tn$ul'Sitibni
clerisli-c-s
The
Arklay
S.
Richards
Co., Inc.
always stocks
a
wide
variety
of thermocouple wire, which covers a service
temperature
range
from -123
to
1093"C (-190 to
2000'F).
This enables you to select the most suitable and economical wire for your
application.
The
maximum service
temperature
is
based
on
the lower limit
of
the wire gauge, or insulation
characteristics.
Refer
to
the two charts below.
All Richards
thermocouple wires are carefully selected and
matched
to conform to ANSI MC 96.1
standards.
The testing for
accu-
racy
and color coding
is
completed here
in
own own
laboratories.
Refer
to our limits of error table
in
this
catalog.
Special premium
grade
wire
is
available
upon
request.
Premium grade thermocouple wire
can
be
designated
by adding a double
type
letter to
the
cat-
alog number. An
example
of
a
catalog
number
for
premium grade
thermocouple
wire
would
be 2OKK'HG.
Ternperature
Limits
for
Wire
Gaugcs
-
.128
.091
.064
.032 .o20
.013
.010
.005
.004
.003
3.25
2.31
1"63
0.81
0.51
0.33
0.25
0.13
0.10
0.08
D
D
Platinum
30% Rhodium
vs.
Platinu
m
60/0
Rhodium
1700"c
3100"F
((
Ni,
1
0"/o
Cr
vs. Constantan
870'c
1600'F
650"c
1200'F
540"C
1000"F
460'C
800'F
430'C
BOO'F
370'C
700"F
300'c
570"F
300'c
570"F
lron vs. Constantan
760"c
1400"F
590'c
1100"F
480'C
900'F
370'c
700'F
370"c
700"F
320'C
600"F
300"c
570'F
300'c
570"F
Ni, 10% Cr vs.
Ni,5%
Al,
si
1260"C
2300"F
1090'c
2000'F
1090'c
2000'F
9BO'C
1800"F
970'c
1600'F
970"c
1600'F
760"C
1400'F
750"C
1380'F
750"c
1380'F
N
Ni,
1
4o/o
Cr,
1.5o/"
Si vs.
Ni,4.5%
Si, .1%
Mg
1260"C
2300'F
1090'c
2000'F
980'C
1800'F
B7O"C
1600'F
B7O"C
1600'F
760'C
1400'F
Platinum vs.
Platinuffi, 13% Rhodium
1480'c
2700"F
1300"c
2400"F
1300'c
2400'F
1200'c
2200"F
T
I
I
Platinum vs.
Platinuffi
,
1O"/o
Rhodium
1490"c
2700"F
1300'c
2400"F
1300"c
2400"F
1200'c
2200"F
Copper vs. Constantan
370'c
700"F
260'C
500"F
200"c
400'F
200"c
400'F
150"C
302'F
150"C
302'F
150"c
302'F
Tungsten,
5o/o
Rhenium vs.
Tu
ngst@n,
260/o
Rhen
iu
m
2310'c
4200"F
lnsulation
Ch
alecteristics
-
H
2600'c
Ceramic
Fibre
Poor
Poor
1200"F
1427"F
2200"c
Fibre Glass,
High
Temperature
Fai
r
Poor
704"F
870'F
1300'c
1600"c
Fibre Glass
,
Varnish
lmpregnated
Fai
r
Fai
r
-23 to
480"F
540"F -10
to 900'C
1000'c
Yes
Kapton
(fused
tape)
Excellent
Excellent
-24O
to
2O4"F
316'F
-400 to 400'C
600"c
Nylon
Excellent
Excellent
-40
to
150'F
-40
to
300"C
Yes
Polyvinyl,
PVP
(extruded)
Good
Excellent
-17
.B
to
105'F
0 to
220"C
Yes
t
Teflon,
FEP
(extruded)
Very Good Excellent
204"F
260"F
400'c
500'c
Yes
Teflon,
TFE
(fused
tape)
Very Good Excellent
260"F
316'F
500'c
600"c
Yes
Teflon,
PFA (fused
tape)
Very Good Excellent
-"
260"F
316'F
500"c
600'c
Yes
Teflon,
PFA (extruded)
Very Good Excellent
260"F
316"F
500'c
600"c
Yes
Vitreous Silica
Fibre
Poor
Poor
0
to
980'F
1093'F
32
to
1800"C
2000'c
Yes
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106