Thermocouples
A34
Scientific Instrument Services, Inc.
TM
Phone: 908-788-5550
www.sisweb.com/catalog/08/A34
In addition to the J thermocouples listed above, we also supply the K type thermocouples. K thermocouples are normally used in the
temperature range of -200°C to 1250°C.
I
ron-constantan thermocouples
are low cost devices used to
measure temperatures to 800°C.
These iron-constantan thermocouples
are often referred to as J thermocouples
and are the standard thermocouples
used in gas chromatographs, mass
spectrometers, and other laboratory and
industrial equipment. The smaller the
diameter of the thermocouple wires, the faster the response time but the more limited the
temperature range and structural strength of the thermocouple. All thermocouples are
supplied with 12" leads. Two styles are available: bare wire thermocouples and ceramic
insulated thermocouples. The bare wire style contains no insulation of any kind on the bare
thermocouple wires. The insulated style contains a 2 hole by 6" length of ceramic insulat-
ing tube. This insulates the thermocouple leads and prevents their shorting out. If desired,
the ceramic tubes can be cut or broken to shorter lengths.
In addition to the iron-constantan thermocouples, S.I.S.
TM
can supply other types and
configurations of thermocouples. Call or write with your requirements.
Other types and styles available on special request
Wire diameter
Response Time
.005"
1 sec.
.010"
5 sec.
.020"
20sec.
.032"
40 sec.
Part No
Description
Wire diameter
Ceramic diameter
Iron-constantan thermocouple, bare
.032"
-
Iron-constantan thermocouple, bare
.020"
-
Iron-constantan thermocouple, bare
.015"
-
Iron-constantan thermocouple, bars
.010"
-
Iron-constantan thermocouple, bare
.005"
-
Iron-constantan thermocouple, insulated
.032"
.125"
Iron-constantan thermocouple, insulated
.020"
.125"
Iron-constantan thermocouple, insulated
.015"
.125"
Iron-constantan thermocouple, insulated
.010"
.125"
Iron-constantan thermocouple, insulated
.005"
.062"
Part No
Description
Wire diameter
Ceramic diameter
Type K thermocouple, bare
.020"
-
Type K thermocouple, bare
.010"
-
Type K thermocouple, bare
.005"
-
Type K thermocouple, insulated
.020"
.125"
Type K thermocouple, insulated
.010"
.125"
Type K thermocouple, insulated
.005"
.062"
Bare Wire
Thermocouple
6x
Magnification
of tips
Ceramic Insulated Thermocouple
S.I.S. has made a variety of different styles and types of thermocouples.
Iron-Constantan Thermocouples (Type J)
Chromel-Alumel Thermocouples (Type K)
Wire Diameters to Gage Size Cross Reference Table
Gage Size
Wire diameter
Gage Size
Wire diameter
Gage Size
Wire Diameter
Gage Size
Wire Diameter
50
0.00099"
39
0.00353"
28
0.0126"
17
0.0453"
49
0.00111"
38
0.00396"
27
0.0142"
16
0.0508"
48
0.00124"
37
0.00445"
26
0.0159"
15
0.0571"
47
0.00140"
36
0.00500"
25
0.0179"
14
0.0641"
46
0.00157"
35
0.00561"
24
0.0201"
13
0.0720"
45
0.00176"
34
0.00630"
23
0.0226"
12
0.0808"
44
0.00198"
33
0.00708
22
0.0253"
11
0.0907"
43
0.00222"
32
0.00795"
21
0.0285"
10
0.1019"
42
0.00249"
31
0.00893"
20
0.0320"
41
0.00280"
30
0.01000"
19
0.0359"
40
0.00314"
29
0.0113"
18
0.0403"
tip...
