Product Description:

Tungsten rhenium thermocouples are characterized by high melting point (3300 ℃), low vapor pressure, and high chemical stability in non oxidizing atmosphere. Large electromotive force, high sensitivity, mainly low price. At present, the non-contact method is often used to measure the temperature above 1600 ℃, but the error of this method is large. For example, the contact method can accurately measure the real temperature. Among the high temperature thermocouples, precious metal thermocouples are expensive and the measurement temperature can only be below 1800 ℃, while tungsten rhenium thermocouples are not only of high temperature limit, but also of good stability. Therefore, tungsten rhenium thermocouples are widely used in metallurgy, building materials, aerospace, aviation and nuclear energy industries. China is rich in tungsten resources, and tungsten rhenium thermocouples are cheap, which can partially replace precious metal thermocouples (platinum rhodium thermocouples). It is a very promising temperature measurement material in the field of high temperature testing.

Its use temperature can reach 2800 ℃, but when it is higher than 2300 ℃, the data are dispersed. Therefore, the use temperature is suitable for about 2000 ℃.

Tungsten rhenium thermoelectric dipole is easy to oxidize, so it can be used in inert or dry hydrogen, or it can be used only when it is isolated from oxygen by a compact protective tube. It can not be used in carbon containing atmosphere (for example, in the atmosphere containing hydrocarbon, if the temperature exceeds 1000 ℃, it will be corroded). Tungsten or rhenium can easily form stable carbides in carbon containing atmosphere, which will reduce its sensitivity and cause brittle fracture. In the presence of hydrogen, it will accelerate the carbonization.

The oxidation of tungsten rhenium thermocouples is a hot topic at home and abroad. Our company adopts the international advanced manufacturing technology, and has successfully developed the assembled high temperature and high pressure tungsten rhenium thermocouple. The temperature range of this product is 0-1800 ℃, which is widely used in metallurgy, coking, chemical furnace, heat treatment, glass and other industries. It has high precision, low price, stable performance, and is not limited by the working environment atmosphere. It is an ideal product to replace the platinum rhodium thermocouple 。 Tungsten rhenium thermocouples produced by our company have been widely used in many units, and their performance has reached the level of similar products abroad. The technical indicators are as follows:

1. Graduation No.: w-re3 / 25, w-re5 / 26

2. Temperature measurement range: 0 ～ 1800 ℃

3. Temperature measurement accuracy: < 1% t; < 0.5% t

4. Time constant: ≥ 180 s

5. Insulation resistance: > 5m Ω

6. Specification and size: 30050075010001100 (mm)

Tungsten rhenium liquid steel fast temperature thermocouple is specially designed and manufactured for measuring the temperature of molten steel, molten iron and other metals. It has the advantages of small volume, fast thermal response, high accuracy and low price. The technical indicators are as follows:

1. Temperature measurement: 1800 ℃

2. Temperature measurement accuracy: ≤ 0.5%

3. Insulation resistance: ≥ 30 m Ω

4. Formation rate: ≥ 98%

5. Reaction time: < 5 S

At present, tungsten rhenium thermocouples produced by our company are divided into three categories:

One is the fine ceramic protection tube. The specification of the ceramic tube is: the diameter is Ф 8, Ф 10, Ф 12, Ф 14, Ф 16, the length is 300 ~ 1100mm. This kind of thermocouple can be used in any atmosphere for a long time without the limitation of the working environment atmosphere, and the temperature measurement range is 0 ~ 1800 ℃.

The other is pure molybdenum protection tube. The specifications of molybdenum tube and tungsten tube are: diameter is Ф 6, Ф 8, Ф 10 mm, length is 500-700mm, this thermocouple can only work in the environment of vacuum, reduction or inert gas protection for a long time, molybdenum tube is suitable for long-term use below 1800 ℃, short-term use temperature can reach 2000 ℃;

Another is tungsten protection tube. As for tungsten tube, it can work for a long time at 2100 ℃, but it is difficult to process, which makes its price very expensive.

Please select the thermocouple suitable for you according to our parameters.