UA-17 www.omega.co.uk +44 (0)161 777 6611 ® Unsheathed Fine Diameter Tungsten-Rhenium 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 two widely used Tungsten- Rhenium thermocouple calibrations. 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.” The average EMF of the W-3% Re/W-25% Re is 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. Wire Diameter mm (in.) Temperature Range (†) Maximum Error or Departure 0.075 0 to 425°C (32 to 800°F) ±4.5°C (±8°F) (0.003) 426 to 1750°C (800 to 3200°F) ±1% 0.125 0 to 425°C (32 to 800°F) ±4.5°C (±8°F) (0.005) 426 to 1975°C (800 to 3600°F) ±1% 0.25 to 0.50 0 to 425°C (32 to 800°F) ±4.5°C (±8°F) (0.010 to 0.020) 426 to 2325°C (800 to 4200°F) ±1% Limits of Error for Tungsten-Rhenium Thermocouple Wire Combinations † Up to 2760°C (5000°F) for short-term exposure. Series - Will measure and control temperatures with Type C thermocouples See OB-Series of OMEGABOND® Cementsin Section F. See page A-147 for Ceramic Insulators. iSeries meters and controllers, shown smaller than actual size, are featured in Sections M and P. ** 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. Ordering Example: T5R-005-12 is a 300 mm (12"), Type C thermocouple, 0.125 mm (0.005") diameter, £26.80. To Order (Specify Model Number) Wire Dia. Price Price per Add’l Materials mm (in.) Model No.** (per Thermocouple) Double Inch C 0.075 (0.003) T5R-003-12 £23.45 £1.34 Tungsten 5% Re- 0.125 (0.005) T5R-005-12 26.80 4.50 Tungsten 26% Re 0.250 (0.010) T5R-010-12 40.20 2.68 0.381 (0.015) T5R-015-12 56.95 4.02 0.500 (0.020) T5R-020-12 73.70 5.36 D 0.127 (0.005) T3R-005-12 26.80 4.50 Tungsten 3% Re- 0.250 (0.010) T3R-010-12 40.20 2.68 Tungsten 25% Re 0.381 (0.015) T3R-015-12 56.95 4.02 0.500 (0.020) T3R-020-12 73.70 5.36 ALL MODELS AVAILABLE FOR FAST DELIVERY! Both 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 oxidising conditions and should not be used in air or atmospheres containing oxygen. OMEGA® Tungsten-Rhenium thermocouples are supplied in 300 mm (12") lengths which corresponds to each for a 600 mm (24") total length. Longer lead lengths are available, Consult Sales. Extreme High Temperature

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