Firmendetails
  • Cangzhou Qirun Detecting Instrument Co., Ltd.

  •  [Hebei,China]
  • Unternehmenstyp:Hersteller
  • Main Mark: Afrika , Amerikas , Asien , Osteuropa , Europa , Mittlerer Osten , Nordeuropa , Ozeanien , Andere Märkte , Westeuropa , Karibik , Weltweit
  • Exporteur:61% - 70%
  • Zert:GS, CE, GB, ISO9001, ISO9002
Cangzhou Qirun Detecting Instrument Co., Ltd.
Title
  • Title
  • Alle
Produktgruppe
Online Service
http://de.qrdetecting.comScannen zu besuchen
Zuhause > Brancheninformationen > S Type Thermocouple for Steel Making Factory
Brancheninformationen

S Type Thermocouple for Steel Making Factory

2019-03-05

The S type thermocouple is also called a single platinum-iridium thermocouple. Its indexing number is the S-grading number. It mainly measures the temperature of the medium from 0 to 1650 °C. It is a category of precious metal thermocouples. Normal use in high temperature applications such as precision foundries and steel making factory.

Platinum rhodium 10-platinum thermocouples (S type thermocouples) are noble metal thermocouples. The diameter of the filament is specified to be 0.04 mm, the allowable deviation is -0.015 mm, and the nominal chemical composition of the positive electrode (SP) is platinum-rhodium alloy, wherein ruthenium is 10%, platinum is 90%, and the negative electrode (SN) is pure platinum. Commonly known as a single platinum rhodium thermocouple. The thermocouple has a long-term maximum operating temperature of 1300 ° C and a short-term maximum operating temperature of 1600 ° C. S type thermocouples have the highest accuracy, best stability, wide temperature range and long service life in the thermocouple series.

It has good physical and chemical properties, good thermoelectric potential stability and high oxidation resistance at high temperatures. It is suitable for oxidizing and inert atmospheres. Because the S-type thermocouple has excellent comprehensive performance and conforms to the internationally used S-type thermocouple with temperature scale, it has long been used as an interpolation instrument for international temperature scales. Although the "ITS-90" stipulates that it will no longer be used as an internal inspection instrument for international temperature scales. However, the International Temperature Advisory Committee (CCT) believes that S-type thermocouples can still be used to approximate the international temperature scale.

s type thermocouple

S-type thermocouples have the highest accuracy when the normal long-term use temperature is about 800~1300°C, but the accuracy of temperature measurement within 800°C is not high, and the long-term use temperature is above 1300°C, it is easy to damage the thermocouple. Choosing a thermocouple with the correct index number is an important factor in ensuring temperature measurement accuracy.

S-type thermocouple manufacturers explain the working principle of thermocouple

Two different conductors (called thermocouple wire or hot electrode), which are joined at both ends into a loop. When the temperature of the joint is different, an electromotive force is generated in the loop. This phenomenon is called thermoelectric effect. The potential is called the thermoelectric potential. Thermocouples use this principle for temperature measurement. One end of the direct temperature measurement is called the working end (also called the measuring end), the other end is called the cold end (also called the compensating end), and the cold end is connected with the display instrument or the supporting instrument. The display meter will indicate the thermoelectric potential generated by the thermocouple.

A thermocouple is actually an energy converter that converts thermal energy into electrical energy and measures the temperature with the generated thermoelectric potential. For the thermoelectric potential of a thermocouple, pay attention to the following problems:

The thermoelectric potential is the difference in temperature function across the thermocouple, not as a function of the temperature difference across the ends.

The magnitude of the thermoelectric potential generated by the thermocouple, when the material of the thermocouple is uniform, is independent of the length and diameter of the thermocouple, and is only related to the composition of the thermocouple material and the temperature difference between the two ends.

When the composition of the two thermocouple wires of the thermocouple is determined, the thermocouple potential of the thermocouple is only related to the temperature difference of the thermocouple. If the temperature of the cold junction of the thermocouple is kept constant, the thermoelectric potential of the thermocouple is only the working temperature. Single value function.

s type thermocouple material

The S-type (platinum-rhodium) thermocouple series is a precious metal thermocouple. The diameter of the filament is specified to be 0.5mm, the allowable deviation is -0.015mm, and the nominal chemical composition of the positive electrode (RP) is platinum-rhodium alloy, which contains 10% bismuth, 90% platinum, and the negative electrode (RN) is pure platinum. The maximum operating temperature is 1300 ° C, and the short-term maximum operating temperature is 1600 ° C.

The S-type (platinum-rhodium thermocouple) series has the highest accuracy, the best stability, wide temperature range and long service life in the thermocouple series. It has good physical and chemical properties, good thermoelectric potential stability and high oxidation resistance at high temperatures, and is suitable for oxidizing and inert atmospheres.

Mobile Webseite Index. Sitemap


Zeichen Sie unseren Newsletter:
Holen Sie sich Updates, Sonderangebote, Big Preise, Rabatte

Multisprache:
Copyright ©2019 Cangzhou Qirun Detecting Instrument Co., Ltd.Alle Rechte vorbehalten
Kontakt mit Lieferant?Lieferant
Wang Mr. Wang
Was kann ich für Sie tun?
Kontakten mit Lieferant