The K-type thermocouple is a widely used sensor in industrial temperature measurement, known for its good linearity, high sensitivity, strong stability, excellent oxidation resistance, and cost-effectiveness. It is commonly used in temperature measurement for various box-type electric furnaces such as quenching furnaces, medical equipment, smelting brick furnaces, testing devices, teaching instruments, and more. For long-term temperature measurements above 1000 degrees, it is recommended to use a protective tube made of 2520 high-temperature resistant material or 310 stainless steel, with wire diameters of 2.5MM, 3MM, or 3.2MM.
Product overview
The K-type thermocouple is one of the most widely used cheap metal thermocouples, with more than the total amount of other types of thermocouples. It is composed of two alloys: nickel-chromium (positive electrode, KP) and nickel-silicon (negative electrode, KN). It is suitable for temperature measurement in oxidizing and inert atmospheres, but not in sulfur, reducing or vacuum environments.
operational principle
The K-type thermocouple works based on the thermoelectric effect, that is, two different conductors are welded at both ends to form a circuit. When there is a temperature difference between the measuring end (working end) and the reference end (cold end), a thermoelectric potential will be generated in the circuit, and the corresponding temperature value can be read by the display instrument.
design feature
The K-type thermocouple is usually composed of a temperature sensing element, an installation and fixing device, and a junction box. The structural forms include:
Armored thermocouple: has the characteristics of high pressure resistance, fast thermal response and flexibility.
Prefabricated thermocouple: suitable for conventional industrial applications, fixed in various ways (thread, flange, etc.).
Explosion-proof thermocouple: suitable for inflammable and explosive environment.
application area
K-type thermocouple is widely used in petroleum, chemical, electric power, metallurgy and other industries. It can measure the temperature of liquid, steam, gas and solid surface, and is often used with display instrument, recorder or control system.
