CCPI Europe presents the Low Drift MI Thermocouples at Heat Treat 17

CCPI Europe presents the Low Drift MI Thermocouples

This week, our Technical Director, Trevor Ford, attended the presentation in Ohio – USA. Presenting the exciting data from the new Low Drift Base Metal Mineral Insulated Thermocouple Cable and Thermocouples for high-temperature applications.

The project is a joint project between CCPI Europe Limited, TE Wire & Cable and the University of Cambridge/Cambridge Enterprise Limited.


History of the project

Over 10 years ago, a student studying at the University of Cambridge looks into temperature measurement using contact sensors. He conducted the thesis on drift characteristics on base metal thermocouples and the reason why base metal thermocouples drift. The creation of the new Mineral Insulated Thermocouple Cable comes directly from this research.

Initially, the study looked at the causes of drift in type K thermocouples.

He conducted a lot of work on bare wire thermocouples and the causes of drift. However, this presentation looks at the work done on the drift in mineral insulated (MI) thermocouple designs. This work, shown as one of the main causes of drift in MI constructions, was due to contamination from the other sheath.

It would be difficult to change the outer sheath material without using a barrier between the outer sheath and conductors to reduce migration.

The project and the new prototypes then underwent rigorous testing at various high-temperature cycles to continue the research. The results seemed too good to be true, and again they underwent high-temperature testing and again, the same results.

The new low drift cables had over 80% drift reduction at 1200℃ and over 90% at 1300℃.

The bulk of the laboratory test under the EMPRESS project on the dual-wall MI cable will conduct under the direction of the University of Cambridge.

In addition, a number of field trials will be taking place, these are currently underway, at various industrial sites.

Two, in particular, are taking place at heat treatment sites in the UK and Europe. These will involve dual wall MI thermocouples, used as the operational measurement sensors at high temperatures under real-life operational industrial conditions.