Tungsten rhenium thermocouple

الوصف

The tungsten rhenium thermo-element's characteristic is: Hot electrode silk melting point high (***0℃), the vapor pulls down, extremely easy to oxidize; The chemical stability is good in the non-oxidized atmosphere. The electromotive force is big, the sensitivity is high, the price is most mainly cheap.

At present surveys ***0℃ the above temperature, uses the non-contact process, but, this method's error is big, if can the accurate surveying leave the true temperature with the contact principle. In the high temperature thermo-element, the noble-metal thermocouple price is expensive, and the maximum temperature also can only in ***0℃ below, but the tungsten rhenium thermo-element temperature measurement upper limit is not only high, moreover the stability is good, therefore, the tungsten rhenium thermo-element in professions and so on metallurgy, building materials, astronautics, aviation and nuclear power obtains the widespread application. Our country's tungsten fruitful in resources, the tungsten rhenium thermo-element price is cheap, may the part substitute for the noble-metal thermocouple (platinum rhodium thermo-element), it is in the high temperature test domain has the future temperature measurement material very much.
　　Its highest application temperature may achieve ***0℃, but, when is higher than ***0℃, the data is scattered. Therefore, the application temperature should better in ***0℃ about.

The tungsten rhenium thermoelectricity dipole easy to oxidize, is suitable for uses in inertia or in the dry hydrogen, or causes it with the compact tube protector to be able to use with the oxygen isolation. Cannot use in including the carbon atmosphere (for example in containing in hydrocarbon atmosphere to use, temperature surpasses ***0℃ namely corrosion). The tungsten or the tungsten rhenium in contains in the carbon atmosphere easy to produce the stable carbide, so that reduces its sensitivity and causes breaks crisply, in has in the situation which the hydrogen exists, will accelerate to carbonize.
　　The tungsten rhenium thermo-element oxidation resistance question has been the topic which the domestic and foreign scholars pay attention, and devotes to the research solution. Our company used the international advanced make craft, the success development has developed the assembly type high temperature high pressure tungsten rhenium thermo-element, this product's temperature measurement scope for 0~***0℃, widely used in professions and so on metallurgy, coked, chemical kiln stove, heat treatment, glass, it had the precision to be high, the price was low, the stable property, working conditions atmosphere's merits and so on limit, was not replaces the platinum rhodium thermo-element the ideal product. Our company produces the tungsten rhenium thermo-element has widely applied in many units, its performance achieves the overseas similar products level. Its technical specification is as follows:
　　 1st, indexing number: W-Re3/*5, W-Re5/*6
　　 2nd, temperature measurement scope: 0~***0℃
　　 3rd, temperature measurement precision: 

3rd, dielectric resistance: ≥*0 MΩ
4th, measures Cheng Lv: ≥*8%
5th, reaction time: < 5 s
　　 At present Our company produces the tungsten rhenium thermo-element divides three kinds:

One kind the fine ceramic tube protector which is uses. The vitrified pipe specification includes: The diameter for Ñ„8, Ñ„*0, Ñ„*2, Ñ„*4, Ñ„*6, length **0~***0mm, this kind of thermo-element the working conditions atmosphere's limit cannot in any atmosphere medium and long-term use, the temperature measurement scope be 0~***0℃

Another kind is the pure molybdenum tube protector. The molybdenum tube and the tungsten tube specification includes: The diameter for Ñ„6, Ñ„8, Ñ„*0mm, length **0~**0mm, this kind of thermo-element can only in vacuum, the return to original state or the inert gas protection environment medium and long-term work, the molybdenum tube should better be under ***0℃ the following temperature the long-term use, the short-term application temperature can arrive ***0℃;

One kind is the tungsten tube protector again. As for the tungsten tube can in ***0℃ under the long lasting work, but very difficult to process causes its price to be expensive.

Please according to us the parameter choice to suit in yours thermo-element.