OMEGA Tungsten-Rhenium Twisted Beaded Thermocouples
Tungsten-Rhenium thermocouples were developed to meet the requirements for measuring ultra-high temperatures in the 2760°C (5000°F) range.
OMEGA makes available three widely used Tungsten-Rhenium thermocouple calibrations. Tungsten versus Tungsten-26% Rhenium, Tungsten-5% Rhenium versus Tungsten-26% Rhenium and Tungsten-3% Rhenium versus Tungsten-25% Rhenium.
OMEGA® Tungsten-Rhenium Thermocouples conform to the limits of error listed in the Table: “Limits of Error for Tungsten-Rhenium Thermocouple Wire combinations.”
Because of the inherent brittleness of unalloyed Tungsten, the Tungsten versus Tungsten-26% Rhenium thermocouples are more difficult to handle than the Tungsten-5% Rhenium versus Tungsten-26% Rhenium combination.
The average EMF of the W-3% Re/W-25% Re is slightly less than that of W/W-26% Re and slightly more than that of W-5% Re/W-26% Re. The ductility of W-3% Re is about equal to that of W-5%Re, but superior to that of unalloyed Tungsten.
All three thermocouple calibrations can be used to 2760°C (5000°F) 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.
OMEGA® Tungsten-Rhenium thermocouples are supplied in 12-inch lengths which corresponds to each leg for a 24" total length. Longer lead lengths are available, Consult Sales.
OMEGA Tungsten-Rhenium Twisted Beaded Thermocouples Feature
Designed for Measuring Ultra-high Temperatures in the 2760°C (5000°F) Range.
Wire Diameters from 0.25mm (.010 inches) to 0.50mm (.020 inches)
Compatible with OMEGA's DPi Panel Meters and CNi Controller Instruments
OMEGA Tungsten-Rhenium Twisted Beaded Thermocouples Specification
Limits of Error for Tungsten-Rhenium Thermocouple Wire Combinations
|
Wire Diameter mm (in)
|
Temperature Range (+)
|
Maximum Error or Departure
|
|
0.075
(0.003)
|
0 to 425°C (32 to 800°F)
426 to 1750°C (800 to 3200°F)
|
±4.5°C (±8°F)
±1%
|
|
0.125
(0.005)
|
0 to 425°C (32 to 800°F)
426 to 1975°C (800 to 3600°F)
|
±4.5°C (±8°F)
±1%
|
|
0.25 to 0.50
(0.010 to 0.020)
|
0 to 425°C (32 to 800°F)
426 to 2325°C (800 to 4200°F)
|
±4.5°C (±8°F)
±1%
|
Note: + Up to 2760°C (5000°F) for short-term exposure.
|
Materials
|
Wire Dia.
mm (in)
|
Unsheathed
Model No.**
|
Butt-Welded
Model No.**
|
|
G
Tungsten-
Tungsten 26% Re
|
0.075 (0.003)
|
TOR-003-12
|
—
|
|
0.125 (0.005)
|
TOR-005-12
|
—
|
|
0.250 (0.010)
|
TOR-010-12
|
TOR-010-12-BW
|
|
0.381 (0.015)
|
TOR-015-12
|
TOR-015-12-BW
|
|
0.500 (0.020)
|
TOR-020-12
|
TOR-020-12-BW
|
|
C*
Tungsten 5% Re-
Tungsten 26% Re
|
0.075 (0.003)
|
T5R-003-12
|
—
|
|
0.125 (0.005)
|
T5R-005-12
|
—
|
|
0.250 (0.010)
|
T5R-010-12
|
T5R-010-12-BW
|
|
0.381 (0.015)
|
T5R-015-12
|
T5R-015-12-BW
|
|
0.500 (0.020)
|
T5R-020-12
|
T5R-020-12-BW
|
| |
0.127 (0.005)
|
T3R-005-12
|
—
|
| |
0.250 (0.010)
|
T3R-010-12
|
T3R-010-12-BW
|
| |
0.381 (0.015)
|
T3R-015-12
|
T3R-015-12-BW
|
| |
0.500 (0.020)
|
T3R-020-12
|
T3R-020-12-BW
|
Note:
*Most popular of the 3 tungsten-rhenium thermocouples; a large selection of instrumentation is available.
** Tungsten-rhenium alloy thermocouples are supplied in standard 300 mm (12") lengths [600 mm (24") loops]. Change suffix “-12” in model
number to indicate additional length (in inches) required. Consult Sales for other sizes.
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