The WRR-131B platinum rhodium 30 platinum rhodium 6 thermocouple (B-type thermocouple) is a precious metal thermocouple. The diameter of the thermocouple wire is specified as 0.5mm, with an allowable deviation of -0.015mm. The nominal chemical composition of its positive electrode (BP) is platinum rhodium alloy, containing 30% rhodium and 70% platinum. The negative electrode (BN) is platinum rhodium alloy, containing 6% rhodium, hence it is commonly known as a double platinum rhodium thermocouple. The maximum operating temperature of this thermocouple is 1600 ℃, and the short-term maximum operating temperature is 1800 ℃.

WRR-131B type thermocouple Anhui Tiankang brand platinum rhodium thermocouple WRR-130B WRR2-130B WRR-131B WRR2-131B platinum rhodium thermocouple, division number B

The WRR-131B thermocouple has the advantages of high accuracy, stability, wide temperature measurement range, long service life, and high temperature measurement upper limit in the thermocouple series. Suitable for oxidizing and inert atmospheres, and can also be used in vacuum for a short period of time, but not suitable for reducing atmospheres or atmospheres containing metal or non-metal vapors. A significant advantage of B-type thermocouples is that they do not require compensation wires, as the thermoelectric potential is less than 3 μ V within the range of 0-50 ℃.

The shortcomings of WRR-131B thermocouple are thermoelectric potential, low thermoelectric potential, low sensitivity, decreased mechanical strength at high temperatures, high sensitivity to pollution, expensive precious metal materials, and therefore a large one-time investment.

B-type thermocouple model and specifications:

model

Dividing number

Temperature measurement range ℃

protective tube material

thermal response time

specification

diameter

Total length (L) Insertion depth I

WRR-130

WRR2-130

B

0-1800

High alumina

Jadeite quality

＜ 150S

Φ16

300x150

350x200

400x250

450x300

550x400

650x500

900x750

1150x1000

1650x1500

2150x2000

WRR-131

WRR2-131

B

0-1800

＜ 150S

Φ25

WRR-131B thermocouple Anhui Tiankang brand

Main technical parameters

Product execution standards

IEC584

IEC751

JB/T5582-1991

Requirements for ordering B-type thermocouples:

1. Indicate the thermocouple model, graduation number, and operating temperature.

2. Diameter and length of thermocouple protection tube.

3. Fasteners and flange devices, provide dimensions.