Engineering resins such as PEEK, PPS, PEI, and PSU require processing temperatures above 300°C, often approaching 400°C. Standard thermocouples cannot maintain accuracy or stability at these levels, leading to drift, oxidation, and failure. Special high-temperature thermocouples are designed to operate reliably under extreme thermal stress.
These sensors use high-purity alloys and mineral insulation resistant to thermal aging. They maintain calibration over long runs at elevated temperatures, preventing material degradation and black specks. Accurate sensing ensures the melt flows properly without decomposition.
In automotive and aerospace molding, where performance plastics are standard, thermocouple quality directly determines part strength and consistency. Using inferior sensors leads to high scrap rates and unreliable production.
