Thermocouples and RTDs

Industrial process thermocouples

Big Chief Offers a wide selection of industrial process thermocouples to meet the requirements of the most demanding process applications. We can offer tight quality control standards per ANSI specifications and these thermocouples are capable of handling direct immersion into high pressure or corrosive applications.

General Purpose Thermocouple

To order, specifiy catalog number, A and B length, and type J, K, T, or E. Also Specify 1/8″ or 3/16″ dia. tip.

Extension Cable Assemblies

To order, specify catalog number, B length

Terminal Style	Thermocouple	Dual Thermocouple
1-1	BC1538-1	BC1538-4
1-2	BC1538-2	BC1538-5
1-3	BC1538-3	BC1538-6
2-3	BC1538-7	BC1538-10
2-2	BC1538-8	BC1538-11
3-3	BC1538-9	BC1538-12
Note:Thermocouple calibration ISA standard grade type J Iron-Constantan. Dual types have dual plugs and/or jacks.

Patch Type Thermocouple

To order, specify catalog number, B length

Terminal Style	S.S. Overbraid
1	BC31131-1
2	BC31131-2
3	BC31131-3

Extruder Melt Type (900° F Max)

To order, specify catalog number.

Rigid Plug Extension
	Terminal Style 2
A	L = “3”	L = “6”
Flush	BC1528-1	BC1528-6
1/4″	BC1528-2	BC1528-7
1/2″	BC1528-3	BC1528-8
3/4″	BC1528-4	BC1528-9
1″	BC1528-5	BC1528-10

Flexible Plug Extension
	Terminal Style 2
A	L = “3”	L = “6”
Flush	BC1528-21	BC1528-26
1/4″	BC1528-22	BC1528-27
1/2″	BC1528-23	BC1528-28
3/4″	BC1528-24	BC1528-29
1″	BC1528-25	BC1528-30

Adjustable Melt Bolt Thermocouple AM 100

The standard assembly consists of an 1/8″ O>D> MgO insulted type “J” thermocouple in a stainless steel sheath. The body is stainless steel with a 1/2″-20UNF-2A thread. A thermal barrier reduces heat transfer from body to thermocouple. Other parts include a packing seal, compression barrel nut, hex adjusting screw and polarized quick-disconnect male plug. Standard immersion is adjustable from flush to 1″. Standard body lengths are 3″, 4″, and 6″ measured from the beginning of wrench flats to the bolt tip. The adjustable plastic melt thermocouple has a movable probe activated by an inner screw mechanism. The probe can be immersed into or withdrawn from the plastic melt stream while the extruder is in full operation at maximum flow rates and pressures. This feature permits temperature measurement at various depths in the melt stream, eliminates thermocouple breakage at start-up, and prevents hang-up. The thermocouple is self-cleaning; as it is retracted into the body any film formed on it is scraped off.

Surface Thermocouple (900° F Max)

To order, specify catalog number, B length.

Terminal Style	13/32″ ID	#10 Washer
1	BC1558-1	BC1558-17
2	BC1558-2	BC1558-18
3	BC1558-3	BC1558-19

Bayonet Mount: Adjustable Length (800° Max)

Spring Type: Stainless steel overbraided wire

Terminal Style	Spring Type Thermocouple
1	BC1508-1
2	BC1508-2
3	BC1508-3
To order, specify catalog number and B length.

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Bayonet Mount: Adjustable Length (800° Max)

Flex Hose Type: Stainless steel flex hose acts as spring

Terminal Style	Flex Hose TypeThermocouple
1	BC1508-14
2	BC1508-15
3	BC1508-16
To order, specify catalog number and B length.

Bayonet Mount: Adjustable Length (800° Max)

Straight

45° Bend

90° Bend

To order, specify catalog number, A length, B length

Compression Fitting Mount: Flexible Extension (900° Max)

Straight

45° Bend

90° Bend

To order, specify catalog number, A length, B length

For dual elements, add prefix “D” to catalog number

Injection Molding Nozzle Type (900° Max)

Terminal Style	Not In-Melt Thermocouple
1	BC1548-1
2	BC1548-2
3	BC1548-3
To order, specify catalog number and B length.