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THERMOCOUPLES
+ BEADED WIRE THERMOCOUPLE
+ WASHER STYLE THERMOCOUPLE
+ TUBE AND WIRE PROBE
+ BAYONET THERMOCOUPLE
+ STANDARD AND MINI PLUG THERMOCOUPLE
+ TRANSITION THERMOCOUPLE
+ INDUSTRIAL HEAD THERMOCOUPLE
+ CEMENT AND STICK ON THERMOCOUPLES
| COMMON THERMOCOUPLE TEMPERATURE RANGES |
| CALIBRATION | TEMPERATURE RANGE | STD. LIMITS OF ERROR | SPEC. LIMITS OF ERROR |
| J | 0 °C to 750 °C (32°F to 1382 °F) |
Greater of 2.2 °C Or 0.75% |
Greater of 1.1 °C or 0.4% |
| K | -200 °C to 1250 °C (328 °F to 2282 °F) |
Greater of 2.2 °C Or 0.75% |
Greater of 1.1 °C or 0.4% |
| E | -200 °C to 900 °C (-328 °F to 1652 °F) |
Greater of 1.7 °C Or 0.5% |
Greater of 1.0 °C or 0.4% |
| T | -250 °C to 350 °C (-328 °F to 662 °F) |
Greater of 1.0 °C Or 0.75% |
Greater of 0.5 °C or 0.4% |
MINERAL INSULATED THERMOCOUPLES
| • Useable under severe conditions • Withstands temperatures up to metal melting point • Withstands corrosive conditions limited only by the choice of sheath material • Can be formed to a minimum radius of twice the sheath diameter without loss of integrity |
• Available in a wide variety of diameters from .010” to .500” • Available in standard and special limits of error • Can withstand external pressures up to 50,000 psi • Dual element cable is available |
| COMMON THERMOCOUPLE TEMPERATURE RANGES |
| Sheath Material | Code | Max. Temp. In Air | Melting Point |
| 304SS | A | 1650 °F (900 °C) | 2550 °F (1400 °C) |
| 310SS | D | 2000 °F (1090 °C) | 2550 °F (1400 °C) |
| 316SS | F | 1650 °F (900 °C) | 2500 °F (1370 °C) |
| Inconel® 600* | Q | 2000 °F (1090 °C) | 2470 °F (1350 °C) |
| Hastelloy® C-276 | H | 1900 °F (1037 °C) | 2415 °F (1320 °C) |
| Hastelloy® B2 | I | 2500 °F (1370 °C) | |
| Hastelloy® X | L | 2470 °F (1355 °C) | |
| Titanium** | T | 600 °F (315 °C) | 3135 °F (1725 °C) |
| Tantaium | O | 900 °F (480 °C) | 5425 °F (2995 °C) |
| Molybdenum*** | P | 500 °F (260 °C) | 4730 °F (2610 °C) |
| Pit. 10% Rhodium | X | 2825 °F (1550 °C) | 3362 °F (1850 °C) |
| Pit. 20% Rhodium | Y | 3000 °F (1650 °C) | 3452 °F (1900 °C) |
| Monel® | M | 2372 °F (1300 °C) | 2462 °F (1350 °C |
*Not recommended for use in Sulfur atmospheres.
**Titanium is not recommeded for use in air above 600 ºF due to oxidation.
*** Refractory metals are extremely sensitive to Oxygen and must be used in vacuum or inert gas such as Helium or Argon.
| **Calibration | Symbol |
| Chromel-Alumel | K |
| Iron-Constantan | J |
| Copper-Constantan | T |
| Chromel-Constantan | E |
| 90% Platinum - 10% Rhodium vs. Platinum | S |
| 70% Plantinum - 30% Rhodium vs. 94% Plantinum 6% Rhodium | B |
| Tungsten 5% Rhenium vs. Tungsten 26% Rhenium | C |
** Other calibrations available. Consult sales.
MULTIPOINT THERMOCOUPLES
| STANDARD OUTSIDE DIAMETER & MAXIMUM LENGTHS |
| O.D. | Tolerance | Max. # of Points | Normal Length | Max Length | Notes |
| .313” | +/- .003” (7.95mm) | Up to 19 | 250 feet | 500 feet | Type K Max 2100 ºF |
| .250” | +/- .002” (6.35mm) | Up to 13 | 400 feet | 800 feet | Type K Max 2100 ºF |
| .188” | +/- .002” (4.78mm) | Up to 10 | 700 feet | 1400 feet | Type K Max 2100 ºF |
| .125” | +/- .002” (7.95mm) | Up to 7 | 1600 feet | 3200 feet | Type K Max 1960 ºF |
| WALL THICKNESS & WIRE DIAMETERS |
| Number of Thermocouple Measuring Points | Wall Thickness (% of Diameter) | Outer Wire Diameter (% of Diameter) | Inner Wire Diameter (% of Diameter) |
| 2-4 | 11.8% | 11.0% | 15.5% |
| 5-7 | 11.8% | 8.5% | 11.7% |
| 8-10 | 11.8% | 8.0% | 10.3% |
| 11-13 | 11.8% | 7.6% | 11.4% |
| 14-16 | 11.8% | 7.2% | 12.1% |
| 17-19 | 7.8% | 7.3% | 14.3% |
Click here to view our Thermocouples guide.
