Interesting facts about thermocouple wire
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Principle of operation
When the conductors from different metals are heated, a potential difference appears between them. If the heating is insignificant, thermocouples with high thermo-emf are used for more accurate readings. They are equipped with positive electrodes from: copper, chromel, or iron, and negative — from alumel, copel or constantan. Compensation wires transmit the potential to the recording sensor. For such wires, a cheaper wire is used: Constantanum, Kromel or KM, Copel. From the copel and constantan, resistance standards are produced.
Types of thermocouples and measurement ranges
- t ° 200 — 1000 ° C — alumel — chromel (TXA);
- t ° 200 — 800 ° C — coppers — chromel (TCA);
- t ° from -40 to 900 ° C — constantan — chromel (ТХК);
- t ° to 300 ° C — copper-constantan;
- t ° from 0 to 760 ° C — iron-kopel;
- t ° in an inert medium up to 3000 ° C, tungsten-rhenium.
- measures very low cryogenic temperatures — iron-constantan;
Application
Production of thermocouples, as well as compensating wires in measuring and conversion devices of automation systems that operate at very high temperatures.
Storage
In closed warehouses or under a canopy, where adequate protection against mechanical and other damages is provided.
Delivery, price
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