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Thermocouple wire
Thermocouple temperature range and tolerance
| Type | Standard | Operating temperature range （℃） | Tolerance（℃） | |||
| Long term | Short term | Grade | Temperature range | Tolerance | ||
| Type K | GB/T2614 K | 1200 | 1300 | I | -40~1100 | ±1.5℃/±0.4%t |
| II | -40~1300 | ±2.5℃/±0.75%t | ||||
| Type N | GB/T17615 N | 1200 | 1300 | I | -40~1100 | ±1.5℃/±0.4%t |
| II | -40~1300 | ±2.5℃/±0.75%t | ||||
| Type E | GB/T4993 E | 750 | 900 | I | -40~800 | ±1.5℃/±0.4%t |
| II | -40~900 | ±2.5℃/±0.75%t | ||||
| Type J | GB/T4994 J | 600 | 750 | I | 0~750 | ±1.5℃/±0.4%t |
| II | ±2.5℃/±0.75%t | |||||
| Type T | GB/T2903 T | 300 | 350 | I | -40~350 | ±0.5℃/±0.4%t |
| II | ±1℃/±0.75%t | |||||
| III | -200~40 | ±1℃/±1.5%t | ||||
* Operating temperature range (℃): K、N、E、T Ø3.2mm, T Ø2.0mm。
|
Type |
Grade |
Temperature range ℃ |
Tolerance |
|
PtRh30/PtRh6 Type B |
2 |
600--1700 |
±0.25%×t |
|
3 |
600--800 |
±4℃ |
|
|
800--1700 |
±0.5%×t |
||
|
PtRh13/Pt Type R |
1 |
0--1100 |
±1℃ |
|
1100--1600 |
1+{(t-1100)×0.003} |
||
|
2 |
0--1100 |
±1.5℃ |
|
|
1100--1600 |
±0.25%×t |
||
|
PtRh10/Pt Type S |
1 |
0--1100 |
±1℃ |
|
1100--1600 |
1+{(t-1100)×0.003} |
||
|
2 |
0--1100 |
±1.5℃ |
|
|
1100--1600 |
±0.25%×t |
Size Range: 0.013mm-0.5mm
Thermocouple compensating wire
Thermocouple compensating wire is used to connect the electrode (cold side of thermocouple) with display instrument in order to form a temperature measurement system. The working temperature is -25~200℃. Our plant mainly manufacture type KX, NX, EX, JX, NC, TX, SC/RC, KCA, KCB and WREC compensating wire for thermocouple, and they are used in temperature measurement instruments and cables. Our thermocouple compensating products are all made abiding by GB/T 4990-2010 ‘Alloy wires of extension and compensating cables for thermocouples’ (Chinese National Standard), and also IEC584-3 ‘Thermocouple part 3-compensating wire’ (International standard).
EMF of Compensating wire and the tolerance
| 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 | 100 200 |
646 1 1441 |
- - |
- - |
±60 |
586～706 |
||
| K | KX,KCA or KCB |
G | -25 100 |
-968 4 096 |
±40 | -924～ -1 012 4 052～ 4 140 |
±80 | -880～ -1 056 4 008～ 4 184 |
| H | -25 100 200 |
-968 4 096 8 138 |
±40 | -924～ -1 012 4 052～ 4 140 8 094～ 8 182 |
±88 | -880～ -1 056 4 008～ 4 184 8 050～ 8 226 |
||
| N | NX or NC | G | -25 100 |
-646 2 774 |
±43 | -603～-689 2 731～ 2 817 |
±86 | -560～-732 2 688～ 2 860 |
| H | -25 100 200 |
-646 2 774 5 913 |
±43 | -603～ -690 2 731～ 2 817 5 870～ 5 956 |
±86 | -560～ -732 2 688～ 2 860 5 827～ 5 999 |
||
| E | EX | G | -25 100 |
-1 432 6 319 |
±81 | -1 351～ -1 513 6 238～ 6400 |
±138 | -1 294～ -1 570 6 181～ 6 457 |
| H | -25 100 200 |
-1 432 6 319 13 421 |
±81 | -1 351～ - 1513 6 238～ 6 400 13 340～ 13 502 |
±138 | -1 294～ -1 570 6 181～ 6 457 13 283～ 13 559 |
||
| J | JX | G | -25 100 |
-1 239 5 269 |
±62 | -1 177～ -1 301 5 207～ 5 331 |
±123 | -1 116～ -1 362 5 146～ 5 392 |
| H | -25 100 200 |
-1 239 5 269 10 779 |
±62 | - 177～ -1 301 5 207～ 5 331 10 717～ 10 841 |
±123 | -1 116～ -1 362 5 146～ 5 392 10 656～ 10 902 |
||
| T | TX | G | -25 100 |
-940 4 279 |
±30 | -910～ -970 4 249～ 4 309 |
±60 | -850～ -1 000 4 189～ 4 339 |
| H | -25 100 200 |
-940 4 279 9 288 |
±48 | -892～ -988 4231～ 4 327 9 240～ |
±90 | -850～ -1 030 4 189～ 4 369 9 198～ 9 378 |
||
Compensating wire reciprocating resistance
| Compensation wire type | Reciprocating resistance at 20℃ Ω/m (less than) | ||||
| 0.2m㎡ | 0.5 m㎡ | 1.0 m㎡ | 1.5 m㎡ | 2.5 m㎡ | |
| SC or RC | 0.25 | 0.1 | 0.05 | 0.03 | 0.02 |
| KCA | 3.5 | 1.4 | 0.7 | 0.47 | 0.28 |
| KCB | 2.6 | 1.04 | 0.52 | 0.35 | 0.21 |
| KX | 5.5 | 2.2 | 1.1 | 0.73 | 0.44 |
| EX | 6.25 | 2.5 | 1.25 | 0.83 | 0.5 |
| JX | 3.25 | 1.3 | 0.65 | 0.43 | 0.26 |
| TX | 2.6 | 1.04 | 0.52 | 0.35 | 0.21 |
| NC | 3.75 | 1.5 | 0.75 | 0.5 | 0.3 |
| NX | 7.15 | 2.86 | 1.43 | 0.95 | 0.57 |
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