This article outlines the major threats to long-term thermocouple accuracy, focusing on decalibration, metallurgical degradation, contamination, thermal aging, and mechanical and electrical stress in industrial applications.

The NESSTECH SEGTEMP50R-HC (SEG-HYBRID) is a high-precision Liquid/Gas Expansion Temperature Gauge designed for demanding industrial environments. Its non-mercury, silicon-filled mechanism ensures safety, stability, and accuracy from 50 °C to 650 °C, backed by Japan’s renowned NESSTECH engineering.