Omega Products T3R-010-12-BW User Manual

Tungsten-Rhenium Twisted Beaded

Thermocouples

See Page A-142

for Ceramic Insulators.

Butt-Welded and Unsheathed

Tungsten-rhenium thermocouples were developed to meet the requirements for measuring ultra-high temperatures in the 2760°C (5000°F) range.

OMEGA®sells 3 widely used tungsten-rhenium thermocouple calibrations: tungsten versus tungsten-26% rhenium, tungsten-5% rhenium versus tungsten-26% rhenium, and tungsten-3%

C for U

ontact Sal

ntw

tom

ted

rhenium versus tungsten-25% rhenium. OMEGA tungsten-rhenium thermocouples conform

to the limits of error listed in the table below. Because of the inherent brittleness of unalloyed tungsten,

See OB-Series of

OMEGABOND

on page F-21.

Cements

Butt-Welded

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 3 thermocouple calibrations can be used to 2760°C (5000°F) in hydrogen or inert gas atmospheres and in a vacuum. They deteriorate rapidly under oxidizing conditions and should not be used in air or atmospheres

Butt-Welded

containing oxygen. OMEGA tungsten-rhenium thermocouples come

in 300 mm (12") lengths, which corresponds to each for a 600 mm (24") total length. Longer lead lengths are available; consult sales.

Tem

trem

perature

Sol

ndi

dual

Limits of Error for Tungsten-Rhenium Thermocouple Wire Combinations

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)

†

Up to 2760°C (5000°F) for short-term exposure.

(0.010 to 0.020) 426 to 2325°C (800 to 4200°F) ±1%

MOST POPULAR MODELS HIGHLIGHTED!

To Order (Specify Model Number)

Materials mm (in) Model No.** per TC Add’l Dbl In Model No.** per TC Add’l Dbl In

G 0.075 (0.003) TOR-003-12 $35 $0.50 ——— Tungsten- 0.125 (0.005) TOR-005-12 40 0.75 ——— Tungsten 26% Re 0.250 (0.010) TOR-010-12 60 2.00 TOR-010-12-BW $70 $4

C* 0.075 (0.003) T5R-003-12 $35 $2.00 ——— Tungsten 5% Re- 0.125 (0.005) T5R-005-12 40 2.25 ——— Tungsten 26% Re 0.250 (0.010) T5R-010-12 60 4.00 T5R-010-12-BW $70 $4

D 0.127 (0.005) T3R-005-12 $40 $2.25 ——— Tungsten 3% Re- 0.250 (0.010) T3R-010-12 60 4.00 T3R-010-12-BW $70 $4 Tungsten 25% Re 0.381 (0.015) T3R-015-12 85 6.00 T3R-015-12-BW 95 6

* 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.

Ordering Examples: T5R-005-12, 300 mm (12"), Type C thermocouple, 0.125 mm (0.005") diameter, $40. T5R-010-12-BW, butt-welded Type C thermocouple, 300 mm (12") long with a 0.25 mm (0.010") diameter, $70.

Wire Dia. Unsheathed Price Price per Butt-Welded Price Price per

0.381 (0.015) TOR-015-12 85 3.00 TOR-015-12-BW 95 6

0.500 (0.020) TOR-020-12 110 4.00 TOR-020-12-BW 95 6

0.381 (0.015) T5R-015-12 85 6.00 T5R-015-12-BW 95 6

0.500 (0.020) T5R-020-12 110 8.00 T5R-020-12-BW 95 6

0.500 (0.020) T3R-020-12 110 8.00 T3R-020-12-BW 125 8

A-20

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