9025.19.40.00 - Pyrometers

This HTS category, 9025.19.40.00, specifically classifies pyrometers. Pyrometers are instruments designed to measure high temperatures without direct physical contact, typically by detecting thermal radiation. They are distinct from thermometers, which generally measure temperature through direct contact with the substance or object being measured. Common examples of pyrometers include infrared thermometers used in industrial processes, for checking engine temperatures, or in scientific research.

Within the broader classification of "Thermometers and pyrometers, not combined with other instruments," this subcategory, "Other," distinguishes pyrometers from any other thermometers not explicitly listed elsewhere. It's important to note that this is a terminal classification, meaning there are no further subcategories within 9025.19.40.00. Therefore, the focus for classification here is on the specific function and design of the instrument as a pyrometer, as opposed to any other type of temperature-measuring device.

When classifying goods under this heading, consideration should be given to the primary function of the instrument. If an instrument's principal purpose is the remote measurement of temperature via thermal radiation, it is likely to fall under this pyrometer classification. This contrasts with instruments that measure temperature through immersion, expansion of liquids or gases, or bimetallic strips, which would be classified elsewhere within Chapter 90.