A pyrometer is a type of thermometer used to measure high temperatures, often in industrial settings. Unlike traditional thermometers that require contact with the object being measured, pyrometers can measure temperature from a distance by detecting the infrared radiation emitted by the object. This makes them particularly useful for measuring the temperature of molten metals or other hot materials. There are different types of pyrometers, including optical pyrometers and infrared pyrometers. Optical pyrometers rely on visual comparison of the brightness of the object to a calibrated light source, while infrared pyrometers use sensors to detect infrared radiation. Both types are essential tools in fields like metallurgy and manufacturing.