The American Society for Testing and Materials (ASTM) says that a thermowell is “a closed end re-entrant tube designed for insertion of a temperature sensing element and provided with means for a pressure-tight attachment to a vessel.”Thermowells are basically protective cases that hold temperature sensors like thermocouples, RTDs, or bimetallic thermometers. They are permanently installed … Continue reading Thermowell Selection Procedure – Complete Guide for EPC design Engineers