Thermocouple Type K Extension Cable for Temperature Compensation
The compensation wire models are divided into SC, KC, KX, EX, JX,
TX according to the product variety.
Among them: a) The first letter of the model corresponds to the
graduation number of the thermocouple;
b) The letter "X" represents the extended compensation wire (type)
c) The letter "C" represents the compensation type compensation
wire (type)
Note: SC type compensation wires can be equipped with R-type
indexing thermocouples.
- Thermocouple Extension Wire
Type K Extension Cable 0.5*2 red black pvc insulation with pvc
sheath. The conduct is thermocouple type K material which is
nickel-chrome with nickel-siliconor nickel-aluminum. The construction is similar to pair instrumentation cable but the
conductor material is different. Thermocouples are used in
processes to sense temperature and is connected to the pyrometers
for indication and control. The thermocouple and pyrometer are
electrically conducted by thermocouple extension cables /
thermocouple compensating cables. The conductors used for these
thermocouple cables are required to have similar thermo-electric
(emf) properties as that of the thermocouple used for sensing the
temperature.
Basically, Fine Wire Thermocouple grade wires are used to make sensing points of thermocouples.
However, a Thermocouple Extension Wire is only used to extend a thermocouple signal back from the probe to
the instrument reading it. A thermocouple Extension Cable is used in lower ambient temperatures. It may pass a signal
representing a higher temperature than it received from the probe.
However, Type K Thermocouple Extension Wire may not be physically exposed to that high temperature. A Stranded Thermocouple Wire can be used as an extension wire but an extension wire cannot be
used in a Flexible Thermocouple Wire as a sensing point. The usable length of these wires differs based
on numerous factors.
| Code | Wires component of the thermocouple |
| +Positive leg | -Negative leg |
| N | Ni-cr-si (NP) | Ni-si-magnesium (NN) |
| K | Ni-Cr (KP) | Ni-Al(Si) (KN) |
| E | Ni-Cr (EP) | Cu-Ni<constantan> (EN) |
| J | Iron (JP) | Cu-Ni<constantan> (JN) |
| T | Copper (TP) | Cu-Ni<constantan> (TN) |
| ASTM | ANSI | IEC | DIN | BS | NF | JIS | GOST |
| (American Society for Testing and Materials) E 230 | (American National Standard Institute) MC 96.1 | (European Standard by the International Electrotechnical Commission
584)-1/2/3 | (Deutsche Industrie Normen) EN 60584 -1/2 | (British Standards) 4937.1041, EN 60584 - 1/2 | (Norme Française) EN 60584 -1/2 - NFC 42323 - NFC 42324 | (Japanese Industrial Standards) C 1602 - C 1610 | (Unification of the Russian Specifications) 3044 |
Detailed Parameter of thermocouple wire
Working Temperature Range
| Diameter/mm | Long time Working temperature /ºC | Short period Working temperature /ºC |
| 0.3 | 700 | 800 |
| 0.5 | 800 | 900 |
| 0.8,1.0 | 900 | 1000 |
| 1.2,1.6 | 1000 | 1100 |
| 2.0,2.5 | 1100 | 1200 |
| 3.2 | 1200 | 1300 |
| Thermocouple No. indexing | Compensation wire type | Usag Classification | Measuring junction temperature / ℃ | standard EMF value/μV | Precision grade | General grade | | Tolerance μV | Thermal EMF range μV | Tolerance μV | Thermal EMF range μV | | SorR | SC or RC | G | 100 | 646 | ±30 | 616~676 | ±60 | 586~706 | | H | 100 | 646 | - | - | ±60 | 586~706 | | 200 | 1 1441 | - | - | 1.381~1 501 | | | | | | | K | KX,KCA | G | -25 | -968 | ±40 | -924~-1 012 | ±80 | -880~-1 056 | | or KCB | 100 | 4 096 | 4 052~4 140 | 4 008~4 184 | | H | -25 | -968 | ±40 | -924~-1 012 | ±88 | -880~-1 056 | | 100 | 4 096 | 4 052~4 140 | 4 008~4 184 | | 200 | 8 138 | 8 094~8 182 | 8 050~8 226 | | N | NX or NC | G | -25 | -646 | ±43 | -603~-689 | ±86 | -560~-732 | | 100 | 2 774 | 2 731~2 817 | 2 688~2 860 | | H | -25 | -646 | ±43 | -603~-690 | ±86 | -560~-732 | | 100 | 2 774 | 2 731~2 817 | 2 688~2 860 | | 200 | 5 913 | 5 870~5 956 | 5 827~5 999 | | E | EX | G | -25 | -1 432 | ±81 | -1 351~-1 513 | ±138 | -1 294~-1 570 | | 100 | 6 319 | 6 238~ 6400 | 6 181~6 457 | | H | -25 | -1 432 | ±81 | -1 351~- 1513 | ±138 | -1 294~-1 570 | | 100 | 6 319 | 6 238~6 400 | 6 181~6 457 | | 200 | 13 421 | 13 340~13 502 | 13 283~13 559 | | J | JX | G | -25 | -1 239 | ±62 | -1 177~-1 301 | ±123 | -1 116~-1 362 | | 100 | 5 269 | 5 207~5 331 | 5 146~5 392 | | H | -25 | -1 239 | ±62 | - 177~-1 301 | ±123 | -1 116~-1 362 | | 100 | 5 269 | 5 207~5 331 | 5 146~5 392 | | 200 | 10 779 | 10 717~10 841 | 10 656~10 902 | | T | TX | G | -25 | -940 | ±30 | -910~-970 | ±60 | -850~-1 000 | | 100 | 4 279 | 4 249~4 309 | 4 189~4 339 | | H | -25 | -940 | ±48 | -892~-988 | ±90 | -850~-1 030 | | 100 | 4 279 | 4231~4 327 | 4 189~4 369 | | 200 | | | |
|
Size range
Wire: 0.12 to 8.0 mm.
- Type N Accuracy (whichever is greater):
Maximum continuous operating temperature: up to 2,300F (1,260C)
Short term use: 2,336F (1,280C)
Thermocouple grade wire, -454 to 2300F (-270 to 1,260C)
Extension wire, 32 to 392F (0 to 200C)
