B type thermocouple actual is proper type for B double platinum rhodium thermocouple, it can measure 0 ~ 1800 ℃ of the temperature of the medium, can be long-term use in 1300 ~ 1600 ℃.It is the best thermocouple for high temperature measurement.

R S B type platinum rhodium thermocouple Product Detail:

Platinum rhodium thermocouple also called noble metalthermoucouple.

It usually as temperature transmitter, controller and display instrument to form process control system, And directly measure or control in the production of a variety of fluid steam and gas medium and solid surface temperature.over a range of 0-1800 ℃.

Platinum-rhodium 30-platinum-rhodium 6 thermocouple (type B thermocouple) is a precious metal thermocouple.Its composition of the positive electrode (BP) is platinum-rhodium alloy, including 30% rhodium and 70% platinum, and the negative electrode (BN) is platinum-rhodium alloy and 6% rhodium, so it is commonly known as double platinum-rhodium thermocouple.

The thermocouple long-term maximum temperature of 1600 ℃, the highest short-term using temperature is 1800 ℃.

The b-type thermocouple has the advantages of the highest accuracy, the best stability, the wide temperature measuring area, the long service life and the high upper limit of temperature measuring.It is suitable for oxidizing and inert atmospheres, or for short periods in a vacuum, 

but not for reducing atmospheres or atmospheres containing metallic or nonmetallic vapors.

B type thermocouple is an obvious advantage don't need a compensation for the compensation conductor, because in the range of 0 ~ 50 ℃ and internal potential less than 3 mu V.The shortage of type B thermocouple is the thermoelectric potential, the thermoelectric potential rate is small, low sensitivity, high temperature mechanical strength decline, very sensitive to pollution, precious metal material is expensive, so the one-time investment is large.

Platinum-rhodium thermocouple is composed of two different components of the conductor at both ends of the synthesis circuit, when the two joint temperature is not the same, it will produce a thermal current in the circuit.If there is a temperature difference between the working end of the thermocouple and the reference end, the display instrument will display the corresponding temperature value of the thermoelectric potential generated by the thermocouple.

The thermoelectric heat of the platinum-rhodium thermocouple will increase with the increase of the temperature at the measuring end, and its size is only related to the thermocouple material and the temperature at both ends, and has nothing to do with the length and diameter of the hot electrode.The appearance of various platinum-rhodium thermocouple is often very different due to the need, but their basic structure is roughly the same, usually by the thermal electrode, insulator protection tube and junction box and other main components.