Equipment and Measuring Devices
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
Applicable International Standards
TANAKA offers reliable thermocouple wires, manufactured, inspected and calibrated in accordance with the following global standards.
- ISO-9001:2015
- ISO/IEC-17025-2017
- AMS2750F (Aerospace Material Specification)
- ANSI/NCSL Z540-1-1994
- ASTM E220-19
- ASTM E230/E230M-17
- ITS-90 (International Temperature Scale)
- Special Limits +/-0.25% for Type-B
Our thermometer calibration laboratory is a JCSS-accredited facility compliant with the international MRA. “JCSS 0025 Calibration” is the accreditation identifier of our thermometer calibration laboratory.
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.