Thermocouples

Iron-Constantan Thermocouples (Type J)

Iron-constantan thermocouples are low cost devices used to measure temperatures to 800 degrees 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 inch leads. Two styles are available, i.e. bare wire thermocouples and ceramic insulated thermocouples. The bare wire style contain no insulation of any kind on the bare thermocouple wires. The insulated style contains a 2 hole by 6 inch length of ceramic insulating tube. This insulates the thermocouple leads and prevents their shorting out. If desired, the ceramic tubes can be cut or broken to shorter lengths.

Wire diameter	Response Time
0.005 inch	1 sec.
0.010 inch	5 sec.
0.020 inch	20 sec.
0.032 inch	40 sec.

In addition to the iron-constantan thermocouples, S.I.S. can supply other types and configurations of thermocouples. Call or write with your requirements.

Tech Tip S.I.S. has made a variety of different styles and types of thermocouples.

Part No.	Description	Wire Diameter (in)	Ceramic Diameter (in)	est wt.	Quantity In Stock	Price
Iron-constantan thermocouple, UOM=EA
TH1	bare	0.032	---	0.25	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$11.00
TH2	bare	0.020	---	0.25	0^{[*L2]Lead time for this out-of-stock item is approximately 48 hours.}	$11.00
TH3	bare	0.015	---	0.25	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$11.00
TH4	bars	0.010	---	0.25	0^{[*L2]Lead time for this out-of-stock item is approximately 48 hours.}	$11.00
TH5	bare	0.005	---	0.25	0^{[*L2]Lead time for this out-of-stock item is approximately 48 hours.}	$11.00
TH1C	insulated	0.032	0.125	0.25	0^{[*L2]Lead time for this out-of-stock item is approximately 48 hours.}	$24.00
TH2C	insulated	0.020	0.125	0.25	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$24.00
TH3C	insulated	0.015	0.125	0.25	0^{[*L1]Lead time for this out-of-stock item is approximately 24 hours.}	$24.00
TH4C	insulated	0.010	0.125	0.25	0^{[*L2]Lead time for this out-of-stock item is approximately 48 hours.}	$24.00
TH5C	insulated	0.005	0.062	0.25	1	$24.00
[L] Standard lead-time for out-of-stock items is approximately two weeks depending on the item. [L2] Lead time for this out-of-stock item is approximately 48 hours. [*L1] Lead time for this out-of-stock item is approximately 24 hours.
Ordering information. International (non-US) prices available through your local dealer.

Dupont Mass Spectrometer Thermocouple

This thermocouple for the Dupont 21-490 series mass spectrometer has a loop at the end for easy attachment by a screw to the mass spec source.

Constructed from:

0.012" dia. Thermocouple wire.

Loop dia. is 0.07" I.D. to fit a #0-80 screw. Two hole ceramic insulator is 1.0" long by 0.125" diameter.

Part No.	Description	UOM	est wt.	Quantity In Stock	Price
294472	Dupont thermocouple	EA	0.2	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$31.50
[*L] Standard lead-time for out-of-stock items is approximately two weeks depending on the item.
Ordering information. International (non-US) prices available through your local dealer.

Type K Thermocouples

In addition to the J thermocouples listed above, we also supply the K type thermocouples. K thermocouples are normally used in the temperature range -200 deg C to 1200 deg C.

Part No.	Description	Wire Diameter (in)	Ceramic Diameter (in)	est wt.	Quantity In Stock	Price
Type K thermocouple, UOM=EA
THK1	bare	0.020	---	0.25	5	$11.00
THK2	bare	0.010	---	0.25	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$11.00
THK3	bare	0.005	---	0.25	0^{[*L2]Lead time for this out-of-stock item is approximately 48 hours.}	$11.00
THK1C	insulated	0.020	0.125	0.25	0^{[*L1]Lead time for this out-of-stock item is approximately 24 hours.}	$24.00
THK2C	insulated	0.010	0.125	0.25	0^{[*L1]Lead time for this out-of-stock item is approximately 24 hours.}	$24.00
THK3C	insulated	0.005	0.062	0.25	0^{[*L]Standard lead-time for out-of-stock items is approximately two weeks depending on the item.}	$24.00
[L1] Lead time for this out-of-stock item is approximately 24 hours. [L] Standard lead-time for out-of-stock items is approximately two weeks depending on the item. [*L2] Lead time for this out-of-stock item is approximately 48 hours.
Ordering information. International (non-US) prices available through your local dealer.

SIS Catalog Cross Reference
Page #	Part Numbers
A34 - Thermocouples	TH1, TH1C, TH2, TH2C, TH3, TH3C, TH4, TH4C, TH5, TH5C, THK1, THK1C, THK2, THK2C, THK3, THK3C

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