Type B thermocouple

Type B thermocouple: precise measurement of high temperatures

Thermocouples are extremely important tools in the field of temperature measurement. They are devices that use the Seebeck phenomenon, generating a voltage proportional to the temperature difference between two different metals. Today we will focus on Type B thermocouples, which are one of the most reliable and precise types of thermocouple available on the market. Read more!

Thermoelectric sensors - principle of operation

Thermoelectric sensors work on the basis of the Seebeck phenomenon. When two different metals are connected and one of the connections is heated, a voltage is generated proportional to the temperature difference. This voltage is then measured and converted into a temperature reading, allowing the thermocouple to accurately monitor the temperature in different environments.

A thermocouple is a temperature sensor that works on the principle of the Seebeck phenomenon

Properties of type B thermocouples

Type B thermocouples (PtRh30-PtRh6) consist of platinum and rhodium, making them extremely resistant to corrosion and high temperatures. These temperature sensors are capable of measuring high temperatures from -200 to 1600°C, making them ideal for applications in extreme environments, such as measuring the temperature of molten glass in a steel mill.

Type B thermoelectric sensors are resistant to high temperatures and corrosion

Advantages and disadvantages of type B thermocouples

Advantages of Type B thermocouples include their exceptional corrosion resistance and ability to measure-temperature at extreme temperatures. They also comply with AMS 2750 E and CQI-9 standards, which guarantees their reliability and precision.

However, like any device, Type B thermocouples also have some disadvantages. Due to their design, they can be more expensive than other types of thermocouple. In addition, although they are corrosion-resistant, they can be damaged by prolonged exposure to extreme conditions. Another disadvantage is the relatively low sensitivity in the lower temperature range.

Type B thermocouples, due to their resistance to high temperatures, are used, among others, in metallurgy

High-temperature thermocouples - comparison

High-temperature thermocouples are those that are capable of measuring over very high temperature ranges. Types of thermocouples that are often used for high-temperature measurements include:

  • Type B temperature sensor (PtRh30-PtRh6): Type B thermocouples consist of platinum (6% rhodium) and platinum (30% rhodium). They are the most resistant to high temperatures, being able to measure up to 1700°C. They are also highly resistant to corrosion. However, they have the disadvantage of lower sensitivity, especially at temperatures below 50°C.
  • Type R temperature sensor (PtRh13-Pt): Type R thermocouples consist of platinum (13% rhodium) and platinum. They have a measuring range of up to 1600°C. They have higher sensitivity than type B thermocouples, especially at lower temperatures. They are also corrosion resistant, but not as resistant as Type B thermocouples
  • Type S temperature sensor (PtRh10-Pt): Type S thermocouples, like Type R, consist of platinum (10% rhodium) and platinum. They can measure temperatures up to 1600°C. They have similar sensitivity to type R thermocouples and are also corrosion resistant. They are often used in industrial furnaces because of their stability at high temperatures.

In summary, all three types are highly corrosion resistant and can measure over high temperature ranges. The choice between them depends on the specific requirements of the industrial applications in question, such as temperature range, sensitivity and corrosion resistance.

Type S thermocouple also available from JUMO

Temperature sensors and thermocouples for precise temperature measurement

As a leading manufacturer and retailer of measuring devices and automation systems, JUMO offers a wide range of Type B thermocouples.

For example, our product plug-in THERMOCOUPLE WITH TYPE A HEAD is equipped with a type B thermocouple capable of measuring the temperature of liquids and gases. The housing is made of stainless steel or ceramic and the protection rating is IP54.

Another product is the plug-in THERMOCOUPLE WITH TYPE B HEAD TO DIN EN 50447.This model also uses a type B thermocouple to measure temperature in liquids and gases, but offers a higher degree of protection of IP65.

Both of these products comply with AMS 2750 E and CQI-9 standards, confirming their reliability , precision and ability to accurately measure temperature in demanding environments.

Our offer also includes, among others:

  • type k thermocouples ((NiCr-NiAl)
  • j-type thermocouples (Fe-CuNi)
  • s-type thermocouples (PtRh10-Pt)
  • resistance temperature sensors
  • accessories for temperature sensors, e.g. compensation and thermocouple wires to connect thermocouples

JUMO is proud to offer a wide range of products that meet the highest standards of quality and reliability. Are you ready to introduce precision temperature measurement in your plant? Contact us today.

Type B SIL thermocouple for safety chain

Type B thermocouple sensors - a summary

Type B thermocouples are an extremely important tool in industry, offering unparalleled precision and reliability in temperature measurement. Despite some disadvantages, such as higher cost, their advantages far outweigh them, making them an ideal choice for many industrial applications operating in the high temperature range.

Do you have an unusual application? We specialise in manufacturing thermocouples according to individual customer requirements, allowing them to be used in almost any application.