Melting Point in Excess of 4200°F (2315°C)

In order to guarantee the limits of error, NEWPORT sells Tungsten-Rhenium thermocouple wire only in matched pairs by the double foot. Because of the inherent brittleness of unalloyed Tungsten, Rhenium has been added to the positive leg of types C and D to improve handling characteristics. The average emf of types C and D is slightly less than that of the unalloyed type G.

All three thermocouple combinations can be used to 4200°F (2315°C) in hydrogen or inert gas atmospheres and in a vacuum. They undergo rapid deterioration under oxidizing conditions and should not be used in air or atmospheres containing oxygen. Available from stock; other wire sizes and large quantities available by quotation. Consult Special Quotations Department.

Uninsulated Refractory Metal Thermocouple Wire

Model No.	Symbol	Material	Wire Dia. (in.)
WW26-003	G*	Tungsten vs. Tungsten 26% Re	0.003"
WW26-005			0.005"
WW26-010			0.010"
WW26-015			0.015"
WW26-020			0.020"
W5W26-003	C*	Tungsten 5% Re vs. Tungsten 26% Re	0.003"
W5W26-005			0.005"
W5W26-010			0.010"
W5W26-015			0.015"
W5W26-020			0.020"
W3W25-003	D*	Tungsten 3% Re vs. Tungsten 25% Re	0.003"
W3W25-005			0.005"
W3W25-010			0.010"
W3W25-015			0.015"
W3W25-020			0.020"

*Not an ANSI Symbol
**Sold only as matched pairs. A double foot is a foot of positive and matched negative wire.

Extension Grade Wire - Uninsulated Lead Wire For Tungsten-Rhenium Thermocouples

Model No.	Symbol	Thermocouple Used with	Wire Dia.	Max. Temp.
EX-C-010	CX*	W5%Re vs W26%Re	10 mil	1600°F	871°C
EX-C-020			20 mil	1600°F	871°C

*Not ANSI Symbol
Insulated Extension Grade Wire Also Available