Sheathed Platinum Rhodium Thermocouples

The Sheathed Platinum Rhodium Thermocouple is a high - precision temperature - measuring sensor, mainly composed of platinum - rhodium alloy wires, insulating materials, and a metal protective tube. It is widely used in the temperature measurement and control of various production processes in industrial fields such as iron and steel, metallurgy, petrochemical, and glass fiber.

Working Principle

Based on the Seebeck effect, the thermocouple consists of two different metal conductors welded together to form a closed loop. When there is a temperature difference between the two ends, a thermal electromotive force is generated in the loop. If the temperature of one end (the reference end) is kept constant, the thermal electromotive force of the loop becomes a single - valued function of the temperature of the measurement end.

Types

Common types include the single platinum - rhodium thermocouple (platinum - rhodium 10 - platinum) and the double platinum - rhodium thermocouple (platinum - rhodium 30 - platinum - rhodium 6). The long - term maximum operating temperature of the single platinum - rhodium thermocouple is 1300℃, and the short - term maximum is 1600℃. The double platinum - rhodium thermocouple can operate at a long - term high temperature of 1600℃ and a short - term high temperature of 1800℃.

Advantages

This kind of thermocouple has the advantages of high accuracy, good stability, wide temperature measurement range, long service life, and high - temperature resistance. It is suitable for use in oxidizing and inert atmospheres and can also be used in a vacuum for a short time. Besides, the armored structure enables it to resist vibration, high pressure, and chemical corrosion, and it can be bent for easy installation.

Applications

It is mainly used to directly measure or control the temperature of fluids, steam, gas media, and solid surfaces in the range of 0 - 1800℃ in various production processes. It is often used in conjunction with temperature transmitters, controllers, and display instruments to form a process control system.

Technical parameters

a. Diameter of protective tube: Ф4 Ф5 Ф6 Ф8

b. Material: GH3030 GH3039

c. Accuracy level: II.

d. Applicable thermocouple index number: S type B type

e. Armor length: >300mm

The model and the measurement temperature range

Manual Welding

Automatic Welding

Insulation Testing

Laser Marking

Warehouse Managing

Thermocouple Assemble

Vacuum Leak Detection

Surface Polishing

Hot Tags: sheathed platinum rhodium thermocouples, China sheathed platinum rhodium thermocouples manufacturers, factory, Type B Thermocouple