Type K thermocouples, also known as Chromel Alumel, are the most popular type of thermocouple because they are a good all round performer. They have a wide temperature range up to 2000ºF, are reasonably accurate and provide good stability in a wide range of applications. The positive leg is Nickel Chromium and the negative leg is Nickel Aluminium.
Key Features
Wide temperature range: up to 2000 °F (~1090 °C)
Good accuracy with reliable, repeatable readings
Excellent stability over long operating periods
Performs well in a wide range of environments
Positive leg: Nickel–Chromium (Chromel)
Negative leg: Nickel–Aluminium (Alumel)
Resistant to oxidation at elevated temperatures
Fast response time
Cost-effective and widely available
Compatible with standard temperature controllers and instruments
Applications
Industrial furnaces, ovens, and kilns
Heat treatment and metal processing
Plastic extrusion and injection molding
Boilers and thermal power plants
Exhaust gas and engine temperature measurement
Chemical and petrochemical processing
Food processing and industrial heating systems
Laboratory and general industrial temperature measurement