Platinum Rhodium Thermocouple

B type thermocouple

b type thermocouple
b type Platinum Rhodium Thermocouple
Product description: B type thermocouple is a precious metal platinum rhodium thermocouple for measuring high temperature. The material of type B thermocouple is platinum rhodium 30-platinum rhodium 6. The chemical compos
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B type thermocouple is a precious metal platinum rhodium thermocouple for measuring high temperature. The material of type B thermocouple is platinum rhodium 30-platinum rhodium 6. The chemical composition of the positive electrode is platinum rhodium alloy, containing 30% rhodium, 70% platinum, negative Extremely platinum and rhodium alloy, containing 6% rhodium. The most important thing is that the standard stipulates that the diameter of the platinum rhodium couple wire is 0.5mm, and the allowable deviation is -0.015mm.S Type Pt-Rh Platinum Rhodium Thermocouple.
B type thermocouple Features
Type B thermocouple has the highest accuracy, best stability, wide temperature measurement temperature zone, long service life, and high temperature measurement upper limit among the thermocouple series. It is suitable for oxidizing and inert atmospheres, and also for short-term use in vacuum, but not suitable for reducing atmospheres or atmospheres containing metal or non-metal vapors. An obvious advantage of B-type thermocouple is that it does not need compensation wire for compensation, because the thermoelectric potential is less than 3μV in the range of 0~50℃.
B type thermocouple Disadvantage
The shortcomings of the B type thermocouple are the thermoelectric potential, the thermoelectric potential rate is small, the sensitivity is low, the mechanical strength is reduced at high temperature, it is very sensitive to pollution, and the precious metal materials are expensive, so the one-time investment is relatively large. Especially after 2021, the price of B-type thermocouple materials has risen astonishingly.
Specifications of S type/R type/B type platinum rhodium thermocouple

Model

Graduation

Range of temperature

measurement ℃

Thermal response time

Flow rate

Specification

L× 1

WRP-130 WRP2 -130

0~1300

＜150s

High alumina

Φ16

300×150

350×200

400×250

450×300

500×350

550×400

650×500

900×750

1150×1000

1650×1500

2150×2000

WRP-131 WRP2 -131

＜360s

Φ25

WRQ-130 WRQ2 -131

0~1300

＜150s

Φ16

WRQ-130 WRQ2 -131

＜360s

Φ25

WRR-130 WRR-131

0~1600

＜150s

Corundum

Φ16

WRR2 -130

WRR2 -131

＜360s

Φ25

B type thermocouple is actually a double platinum rhodium thermocouple with index number B. It can measure the temperature of the medium from 0 to 1800°C and can be used for a long time at 1300 to 1600°C. It is the best thermocouple for high temperature measurement.

S type R type B type thermocouple

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