More hundred years ago hardly anyone could have imagined such a rapid development of non-ferrous metallurgy. As Mark Twain once observed. prophesy difficult, especially for the future.
Quality thermocouple wire
Thermocouple wire is made from alloys such as alumel, chromel brands T and TM, Kopel, constantan. Their physical properties are in direct proportion to the ratio of the components. Alumel — very malleable, able to maintain long-term durability. Constantan paired with iron, copper and Chromel has a high electrical resistance that is independent of temperature. Copel paired with copper, iron and chromel has properties similar to kontantanom: large thermoelectromotive force, minimum temperature coefficient of electrical resistance, high heat resistance up to 600 ° C and resistance to corrosion. Chromel has high heat resistance and a change in thermoelectric voltage over a wide range.
Advantages thermocouple alloys:
- heat resistance;
- high resistivity;
- average thermal linear expansion coefficient;
- low density;
- large thermoelectric power.
The most important property of the thermocouple wire is considered to be a high rate stable thermoelectric voltage in the range of operating temperature.
Manufacturers of measuring and converting devices, compensation wires, automation systems, operating at high temperatures. A thermocouple consists of two different conductors, one end of which is soldered and placed in the environment to measure temperature (the so-called «hot contact»), and the two free ends are omitted in an incubator — a «cold contact».
How does a thermocouple
The thermoelectric effect is the potential difference arising between the conductors of different materials at higher temperatures. Thermocouples are used to measure very high temperatures. For accurate readings with relatively little heat is used thermocouples with high thermoelectric power. Their positive electrodes: iron, copper, or chromel, and negative — alumel, constantan and Kopel. The magnitude of thermoelectric power leads thermocouple Chromel-Kopel (TCA), applied at t ° up to 800 ° C, when it should be copper-Kopel and iron-Kopel (up to 760 ° C)… Compensation wire — transfer capacity from the free ends of the thermocouple to the sensor. For these wires used cheaper thermocouple wire: chromel grades K and KM, and Kopel, constantan. The last two are used to produce stamps resistance standards.
Varieties thermocouple wire
- alumel — Chromel (TCA), range 200 — 1000 ° C;
- Kopel — Chromel (TCA), the temperature range 200 — 800 ° C;
- Constantan — Chromel (TCA), measures the t ° from -40 to 880 ° C;
- iron-constantan, serves for measuring cryogenic temperatures;
- copper-constantan, measures t ° from 250 to 300 ° C;
- iron Copel, measures t ° from 0 to 750 ° C;
- tungsten-rhenium, used to determine the highest temperature to 3000 ° C in an inert atmosphere.
We deliver certified thermocouple wire. The technical documentation includes data on the chemical composition, limiting the percentage of impurities; mechanical properties of products. We can buy in bulk, any semi-finished products for large-scale productions. We also offer optimal conditions for retail customers. High level of service and efficiency of service are the face of our company.
Buy at the best price
In stock company «Electrovek-steel» is always in the presence of high-grade thermocouple wire at the best price. It is formed with European rates on non-ferrous metals without the inclusion of the additional costs. quality certificate for the product includes data on the chemical composition, limiting the percentage of impurities; mechanical properties. Cooperation with us gives a number of advantages. Our experts will be happy to provide advice when buying any alloys, the correct choice of which will depend on the performance and durability of the equipment. We will help you determine not only the optimum parameters of the product, but also offer the best price.