Equipment and Measuring Devices
Platinum Thermocouples
Widely acclaimed for reliability with established technology
The thermocouple is a thermometer for measuring high temperatures that consists of an electrical circuit created by connecting two wires of different metals. It utilizes the voltage (thermoelectromotive force) created when there is a difference in temperature between the junction and base, calculating temperature from the strength of the voltage. Platinum thermocouples can be used in an oxidizing atmosphere of 1,000℃ or greater and are optimal for temperature control during steel, semiconductor and glass manufacture.
Thermocouple Types, Compositions, Operating Temperatures and Atmospheres
| Constituent symbols |
Composition (+ve, -ve) |
Operating temperature |
|---|---|---|
| R | PtRh13%, Pt | Normal limit: 1,400℃, Overheating limit: 1,600℃ |
| S | PtRh10%, Pt | Normal limit: 1,400℃, Overheating limit: 1,600℃ |
| B | PtRh30%, PtRh6% | Normal limit: 1,500℃, Overheating limit: 1,700℃ |
*Available with a desired wire diameter
Applications
Temperature control sensors used in steel, glass, electrical, semiconductor, and chemical industries
TEMPLAT
As the negative electrode of pure platinum used in type R thermocouples has the disadvantage of easily fracturing at high temperatures, we have improved the platinum to achieve equal or better creep strength than that of a positive electrode at high temperatures.
![[Graph of thermoelectromotive force in type R thermocouples] TEMPLAT and Original Pure Pt](https://prod-cms-cache-bucket.s3-ap-northeast-1.amazonaws.com/wp-content/uploads/sites/images/ex/en/products/images/i02/img_block01_01.jpg)
Thermoelectromotive force in type R thermocouples
This exhibits the same thermoelectromotive characteristics as the negative electrode of pure platinum currently in use, and can therefore be replaced conventional lines.
* The standard wire diameter is φ0.5, with class 2 precision.
For <φ0.5, the maximum length is 3m.
If you would like a different wire diameter or class 1 materials, please inquire separately.