The principle of operation of the thermocouple type chromel alumel
Are you interested in the principle of the operation of the thermocouple type chromel-alumel? Supplier Avlob offers thermocouple wire at a bargain price. We guarantee timely delivery of products to any specified address. Regular customers can take advantage of discount discounts. The price is the best in this segment.
Principle of operation
Heating of conductors from different metals leads to the appearance of a potential difference between them. It is necessary to remember the poor reproducibility of thermo-emf at high temperature, so it is necessary to group and label thermocouples in categories A-1, 2, 3. The first category A-1 makes it possible to use an alloy at max. temperature 2200 ° C, application mode A-2 and 3 is limited to 1800 ° C. It is strictly forbidden to use wire of different markings, since each of them has its own thermo-emf.
Measuring ranges
- t ° 200 — 1000 ° C — alumel-chromel (TXA);
- t ° 200 — 800 ° C — copel-chromel (TCA);
- t ° from -40 to 900 ° C — constantan-chromel (TCA);
Percent composition of alumel
| Fe | Co | Mn | Ni + Co | C | Mn | Al | Si | Impurities |
|---|---|---|---|---|---|---|---|---|
| ≤0.3 | 0.6 — 1.2 | 1.8 — 2.7 | 91.5 — 95.15 | ≤0.1 | 1.8 — 2.7 | 1.6 — 2.4 | 0.85 — 1.5 |
≤0, 7 |
The surface of the alumel wire is more matte, greyish, less shiny than the surface of the chrome
Percentage of chromel
| Ni + Co | Fe | C | Co | Si | Mn | Si | Al | Impurities |
|---|---|---|---|---|---|---|---|---|
| 87.4 — 90.4 | ≤ 0.3 | ≤ 0.2 | 9 — 10 | ≤ 0.4 | ≤ 0.3 | ≤ 0.4 | 0.6 — 1.2 |
≤1,4 |
Storage
In closed warehouses or under a canopy, where adequate protection against mechanical and other damages is provided.
Delivery today
Are you interested in the principle of the operation of the thermocouple type chromel-alumel? Buy thermocouple wire at an affordable price from the supplier Avgob today. The price is formed on the basis of European production standards. The supplier proposes to buy a thermocouple and a compensation wire at the best price either wholesale or retail. We invite you to partner cooperation.