Distinguishing methods for K-type and T-type thermocouples

Thermocouples are widely used temperature measurement devices in industrial and scientific fields. Among them, K-type thermocouple and T-type thermocouple are two common models. This article will introduce how to distinguish between these two types of thermocouples.
1. Principle
Each type of thermocouple is based on the principle of thermoelectric effect. The thermoelectric potential of K-type thermocouples has a linear relationship with temperature and is widely used in industrial automation systems; T-type thermocouples have high stability and are mainly used in laboratories and scientific research fields.
2. Structure
K-type thermocouples and T-type thermocouples also differ in structure. K-type thermocouples are usually made by welding wires of two different metal alloys, commonly nickel chromium nickel silicon (kn) alloy. The T-type thermocouple is made of copper copper nickel alloy.
3. Scope of use
K-type thermocouples are suitable for a wide temperature range and are typically capable of measuring temperatures from -200 ° C to 1250 ° C. The measurement range of T-type thermocouples is relatively small, generally between -200 ° C and 350 ° C.
4. Requirements
In terms of requirements, the measurement of K-type thermocouples is generally within ± 1.5 ° C, while T-type thermocouples can reach ± 0.5 ° C. Therefore, in situations where temperature measurement requirements are relatively strict, t-type thermocouples are usually chosen.
5. Application scenarios
Due to its high stability, T-type thermocouples are mainly used in laboratories and scientific research fields, such as chemical experiments, biological experiments, etc. K-type thermocouples are widely used for temperature monitoring and control in industrial production processes.
6. Price comparison
Later, K-type thermocouples were relatively cheaper and cheaper compared to T-type thermocouples. In limited budget situations, industrial production usually chooses K-type thermocouples as temperature measurement devices.
By introducing the principles, structures, usage ranges, requirements, application scenarios, and price comparisons of K-type and T-type thermocouples, we can clearly distinguish these two types of thermocouples and select appropriate thermocouple models according to different needs.