A comprehensive guide to Type K Thermocouples

16 October 2025 | Labfacility Ltd

A comprehensive guide to Type K Thermocouples

At Labfacility, we specialise in providing high quality Type K thermocouples, known for their reliability and precision in various industrial applications. Our Type K thermocouples are engineered to deliver accurate temperature readings under challenging conditions, making them the go to choice for professionals across multiple industries.

The Type K thermocouple operates on the Seebeck effect, using Chromel and Alumel metals to create a junction that produces a voltage proportional to temperature differences between a hot (measuring) junction and a cold (reference) junction (Fig 1). This voltage, generated along the wires rather than at the junctions themselves, is small and requires precise instruments for accurate temperature measurement, particularly at extreme temperatures. Adjustments are made when the reference junction is at a temperature other than 0°C to calculate the actual temperature difference, ensuring accurate readings.