Effects of Manufacturing Tolerances on the Thermal Response of Industrial Thermometers

Manufacturing tolerances are present in industrial thermometers. These are associated with air gaps and the insulant packing between the sensing element and sheath. Theoretical and experimental results are presented to show the effects of these on the thermal response. Experiments involved various liquids and air. The results indicate that both the air gaps and the insulant packing significantly influence the thermal response. The temperature of the medium appears to have an influence on the porosity of the insulant.