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Noble Metal Thermocouple Elements And Insulators

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Alumina is recommended above 2400ºF. Mullite causes silica contamination of the platinum element above this temperature. Standard insulator = 3/16" O.D. and 1/16" bore.

All elements are provided to match the ITS 1990 curve.
24 ga. (0.020") wire is standard - other gauges are available.
Spools of bare platinum wire are available.


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Item #

Item Name

Element Type

Element Temperature

Insulator OD

Insulator Material

Insulator Temperature

253R Single Bare Wire R Up to 2700 ºF N/A O = Bare wire, no insulator N/A
253R(RG) Single Bare Wire R Up to 2700 ºF N/A O = Bare wire, no insulator N/A
252S Single Bare Wire S Up to 2700 ºF N/A O = Bare wire, no insulator N/A
252S(RG) Single Bare Wire S Up to 2700 ºF N/A O = Bare wire, no insulator N/A
255B Single Bare Wire B Up to 3100 ºF N/A O = Bare wire, no insulator N/A
255B(RG) Single Bare Wire B Up to 3100 ºF N/A O = Bare wire, no insulator N/A
257C Single Bare Wire C Up to 4200 ºF N/A O = Bare wire, no insulator N/A
257C(RG) Single Bare Wire C Up to 4200 ºF N/A O = Bare wire, no insulator N/A
253RR Dual Bare Wire R Up to 2700 ºF N/A O = Bare wire, no insulator N/A
253RR(RG) Dual Bare Wire R Up to 2700 ºF N/A O = Bare wire, no insulator N/A
252SS Dual Bare Wire S Up to 2700 ºF N/A O = Bare wire, no insulator N/A
252SS(RG) Dual Bare Wire S Up to 2700 ºF N/A O = Bare wire, no insulator N/A
255BB Dual Bare Wire B Up to 3100 ºF N/A O = Bare wire, no insulator N/A
255BB(RG) Dual Bare Wire B Up to 3100 ºF N/A O = Bare wire, no insulator N/A
257CC Dual Bare Wire C Up to 4200 ºF N/A O = Bare wire, no insulator N/A
257CC(RG) Dual Bare Wire C Up to 4200 ºF N/A O = Bare wire, no insulator N/A
263R-540A 2 Bore Single Element Alumina Insulated R Up to 2700 ºF 1/8 in A = Alumina 3400 ºF
263R-540A(RG) 2 Bore Single Element Alumina Insulated R Up to 2700 ºF 1/8 in A = Alumina 3400 ºF
263R-541A 2 Bore Single Element Alumina Insulated R Up to 2700 ºF 3/16 in A = Alumina 3400 ºF
263R-541A(RG) 2 Bore Single Element Alumina Insulated R Up to 2700 ºF 3/16 in A = Alumina 3400 ºF
263R-542A 2 Bore Single Element Alumina Insulated R Up to 2700 ºF 1/4 in A = Alumina 3400 ºF
263R-542A(RG) 2 Bore Single Element Alumina Insulated R Up to 2700 ºF 1/4 in A = Alumina 3400 ºF
263R-554M 2 Bore Single Element Mullite Insulated R Up to 2700 ºF 1/8 in M = Mullite 2400 ºF
263R-554M(RG) 2 Bore Single Element Mullite Insulated R Up to 2700 ºF 1/8 in M = Mullite 2400 ºF
263R-551M 2 Bore Single Element Mullite Insulated R Up to 2700 ºF 3/16 in M = Mullite 2400 ºF
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