THERMOCOUPLES
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Description
This is a thermocouple sensor for industrial applications and is available in Type J, K, N, T and other grades upon request.
The thermocouple comprises of various diameter fixed inserts with either a transmitter mounting plate or a ceramic terminal block. The hot junction can be either “grounded” or “ungrounded” from the sheath.
A wide range of terminal heads are available. The thermocouple can be installed into a thermowell or directly into the process by means of an adjustable or fixed fitting.
Design
Technical Specifications
| Designation | Measuring range limits | ||
| Measuring range | Type J (Fe-CuNi) | -210 to +760°C (-346 to +1400°F) | |
| Type K (NiCr-Ni) | -270 to +1100°C (-454 to +2012°F) | ||
| Type N (NiCr-NiSi) | -270 to +1100°C (-454 to +2012°F) | ||
| Type T (Cu-CuNi) | -270 to +400°C (-454 to +725°F) | ||
| The above range may vary depending on limitations of electrical connection chosen and the jacket material of the insert. | |||
| Standard | Type | Special tolerance (larger respective value applies) |
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| Accuracy | ASTM E230-03/ANSI MC96.1 | J (Fe-CuNi) | ±1.1 K or ±0.004 |t|(0 to 760°C) |
| K (NiCr-Ni) N (NiCr-NiSi) | ±1.1 K or ±0.004 |t|(0 to 1260°C) | ||
| T (Cu-CuNi) | ±0.5 K or ±0.004 |t|(0 to 370°C) | ||
| Operating conditions | Maximum ambient temperature | Without mounted head transmitter | Depends on the terminal head and the cable glands used |
| With mounted head transmitter | -40 to 85°C (-40 to +185°F) |
| Diameter (mm) |
Standard stocked grades |
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| Standard insert diameters | 3.0 | ASTM 316, ASTM 310, Alloy 600 | |
| 4.5 | ASTM 316 | ||
| 6.0 | ASTM 316, ASTM 310, Alloy 600 | ||
| 8.0 | ASTM 316 | ||
| 9.5 | ASTM 316, ASTM 310, Alloy 600 | ||
| Standard process connections | Fixed threads | ¼” NPT, ½” NPT, | |
| G½” (BSPP) | |||
| Material: SS316 | |||
| Compression fittings | 1/8″ NPT, ¼” NPT, | ||
| 3/8″ NPT, ½” NPT, | |||
| G½” (BSPP) | |||
| Material: SS316 or brass |
Head, electrical connection and display
| Head (terminal enclosure) | This product is available in the complete range of heads. Complete information on the various options is available in the Thermocouple and RTD Heads section. |
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| Transmitters (optional) | We can manufacture the thermocouples fitted with transmitters to increase accuracy and reliability compared to direct wired solutions. We offer a wide range of transmitters that are PC Programmable including: • HART® Programmable Transmitters • Profibus® PA Head Transmitters • Foundation Fieldbus™ Head Transmitters |
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| Displays (optional) | We can manufacture the thermocouples fitted with pluggable displays to indicate actual measured values, identification and fault events. This requires the use of a suitable terminal head with a display window. |