INDUSTRIAL THERMOCOUPLES
Base Metal Thermocouple Assemblies

 

base metal T/C

Example: K-12-600-24"
Type K Thermocouple, 1/2 NPT, Inconel 600 Tube, 24" long


NOTE: In the Chart below, A refers to Table A (Thermocouple Type), B refers to Table B (Protecting Tube Size), C refers to Table C (Protecting Tube Material), D refers to the Assembly Length from 12", in 6" increments, E refers to Table E (Mounting Bushing) and F refers to the Table Notes. If you have any questions, please contact the factory.


PROTECTING TUBE PART NUMBER
(see Tables A,B,C,E and Notes below)
MATERIAL SIZE NPT
CARBON
STEEL
1/4 NPT A-14-118-D-E-F
1/2 NPT A-12-118-D-E-F
3/4 NPT A-34-118-D-E-F
1 NPT A-44-118-D-E-F
304 SS 1/4 NPT A-14-304-D-E-F
1/2 NPT A-12-304-D-E-F
3/4 NPT A-34-304-D-E-F
1 NPT A-44-304-D-E-F
316 SS 1/4 NPT A-14-316-D-E-F
1/2 NPT A-12-316-D-E-F
3/4 NPT A-34-316-D-E-F
1 NPT A-44-316-D-E-F
446 SS 1/4 NPT A-14-446-D-E-F
1/2 NPT A-12-446-D-E-F
3/4 NPT A-34-446-D-E-F
1 NPT A-44-446-D-E-F
INCONEL 600 1/4 NPT A-14-600-D-E-F
1/2 NPT A-12-600-D-E-F
3/4 NPT A-34-600-D-E-F
1 NPT A-44-600-D-E-F
NOTES:
1) Schedule 40 protecting tubes are standard, for extra-heavy schedule 80 use code "H" (e.g. K-12-600-24"-0-H).
2) For open end, exposed T/C junction construction, use suffix "X" (e.g. 12-304-12"-0-X)


TABLE A - THERMOCOUPLE TYPE
THERMOCOUPLE
TYPE
SINGLE
ELEMENT
DUAL
ELEMENT
Chromel vs Alumel K K2
Iron vs Constantan J J2
NOTES:
1) All assemblies are plain junction unless otherwise specified.
2) For insulated junction, insert "U" (e.g. KU-12-600-24").
3) For angle type assembly, insert "A" code (e.g. KA-12-600-24").
For other than 18" cold leg specify cold leg length (e.g. KA(24")-12-600-24").


TABLE B - PROTECTING TUBE SIZE
PROTECTING TUBE SIZE ORDER
CODE
T/C ELEMENT REPLACEMENT HEAD & BLOCK REPLACEMENT
NPT I.D. x O.D. SINGLE
ELEMENT
DUAL
ELEMENT
SINGLE
ELEMENT
DUAL
ELEMENT
1/4 0.364 x 0.540 14 14-A-R1-D 14-A2-R4-D AWC-1/4 DWC-1/4
3/8 0.493 x 0.675 38 14-A-V1-D 14-A2-R4-D AWC-3/8 DWC-3/8
1/2 0.622 x 0.840 12 08-A-V0-D 14-A-V1-D
(2 pcs.)
AWC-2 DWC-2
3/4 0.824 x 1.050 34 08-A-V0-D 08-A-V0-D
(2 pcs.)
AWC-3 DWC-3
1 1.049 x 1.315 44 08-A-V0-D 14-A-V1-D
(2 pcs.)
AWC-4 DWC-4
NOTES:
1) Schedule 40 protecting tubes are standard, for extra-heavy schedule 80 use code "H" (e.g. K-12-600-24"-0-H).
2) For open end, exposed T/C junction construction, use suffix "X" (e.g. 12-304-12"-0-X)1)
3) Weatherproof cast iron head is standard, for WP aluminum head use suffix "WA" (e.g. K-12-600-24"-WA).
4) For general purpose aluminum head, use suffix "GP" (e.g. K-12-600-24"-GP). Not available in dual element.
5) 1/4 NPT & 3/8 NPT heads utilize reducer bushings.


TABLE C - PROTECTING TUBE MATERIAL
MATERIAL ORDER
CODE
MAX. WORKING
TEMPERATURE
APPROX. MELTING
TEMPERATURE
REPLACEMENT PROTECTING
TUBE CODE
CARBON STEEL 118 1300¡ÆF 2500¡ÆF B-118-D-E
304SS 304 1650¡ÆF 2560¡ÆF B-304-D-E
316SS 316 1700¡ÆF 2500¡ÆF B-316-D-E
446SS 446 2000¡ÆF 2700¡ÆF B-446-D-E
INCONEL 600 600 2100¡ÆF 2550¡ÆF B-600-D-E




TABLE E - MOUNTING BUSHING
FIXED BUSHING
SIZE
PART NO.
(Steel)
PART NO.
(SS)
1/2 NPT F12C F12S
3/4 NPT F34C F34S
1 NPT F44C F44S
1-1/4 NPT F54C F54S
1-1/2 NPT F64C F64S










Notes:
1/2 NPT Bushing fits up to 3/8 pipe.
3/4 NPT Bushing fits up to 1/2 pipe.
1 NPT Bushing fits up to 3/4 pipe.
1-1/4 NPT Bushing fits up to 1 pipe.
1-1/2 NPT Bushing fits up to 1-1/4 pipe.
GIVE IMMERSION LENGTH WHEN ORDERING BUSHING (e.g. 12-304-24"-F34C-18").


For more information regarding Industrial Thermocouples

Please consult your Marlin Catalog, Pages C-60 to C-79.

If you do not have a Marlin Catalog - Click Here!

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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