K-type thermocouple comparison table: Principle, Application and Temperature Measurement Guide

K-type thermocouples, as one of the most commonly used Temperature Sensors in industrial temperature measurement, are widely applied due to their wide temperature range, high cost performance and good stability. This article will provide a detailed introduction to the working principle of K-type thermocouples, the usage method of the comparison table (scale table), typical application scenarios, and selection precautions, helping engineers and technicians quickly master its core knowledge.

1.Introduction to K-Type Thermocouple

1.1 Basic Structure

The K-type thermocouple is composed of nickel-chromium (positive pole, KP) and nickel-silicon (negative pole, KN) alloys, and complies with the IEC 60584 international standard. The temperature measurement range is usually from -200℃ to +1250℃ (up to 1372℃ in the short term).

1.2 Core Advantages

Wide temperature range: Covering low-temperature to high-temperature scenarios

High sensitivity: approximately 41μV/℃

Strong antioxidant property: Suitable for oxidizing atmospheres

Low cost: The cost performance is higher than that of S/B type thermocouples

2.Detailed Explanation of the K-type Thermocouple Comparison Table (Scale Table)

2.1 K-type thermocouple comparison table

2.2 The Function of the Comparison Table

The thermoelectric potential (mV) generated by a thermocouple has a nonlinear relationship with temperature, and the voltage signal needs to be converted into a temperature value through a comparison table.

2.3 Usage Method of the Comparison Table

Cold end compensation: Actual temperature = Measured temperature + Ambient temperature (freezing point compensation required)

3.Typical Applications of K-Type Thermocouples

3.1 Industrial Field

Temperature monitoring of furnaces and heat treatment equipment

Pipeline temperature detection in the petrochemical industry

Temperature control system of plastic extruder

3.2 Laboratory Scene

High-temperature performance testing of materials

Calibration of the constant temperature bath

3.3 Precautions

Electromagnetic interference: Shielded cables must be used

Deterioration risk: Long-term exposure to temperatures above 1000℃ will lead to a decline in accuracy

Installation requirements: Avoid mechanical stress affecting measurement accuracy

Mastering the usage method and precautions of the K-type thermocouple comparison table can significantly enhance the reliability of the temperature measurement system. It is recommended to calibrate the sensor regularly in practical applications and refer to the latest international standard calibration table data. If you need to obtain the complete grading table or have technical consultation, please feel free to leave a message for communication.