What device is used to measure the temperature of a substrate?

The magnetic surface contact thermometer is specifically designed to measure the temperature of a substrate effectively. This device can attach directly to a metal surface, allowing for an accurate reading of the substrate temperature, which is crucial for coating applications. Accurate measurements help ensure that the surface is within the optimal temperature range for the application of various coatings, as temperature can significantly affect coating performance and adhesion.

In contrast, while thermal imagers and infrared thermometers can measure surface temperatures, they may not always provide direct or precise readings of the specific substrate temperature, especially if there are issues related to emissivity or the material being measured. Digital thermometers can be useful, but they typically require direct contact with the surface and may not always be optimized for the unique requirements of substrate temperature measurement in coating situations. Therefore, the magnetic surface contact thermometer is the most suitable and commonly used device for this purpose in the field of coatings inspection.