An optical pyrometer is a device used to measure the temperature of an object without direct contact. It works by detecting the visible light emitted by a hot object and converting that light into a temperature reading. This method is particularly useful for measuring high temperatures, such as those found in furnaces or molten metal. These instruments are often used in industrial settings, where precise temperature control is essential. Optical pyrometers can provide quick and accurate readings, making them valuable tools in processes like metalworking and glass manufacturing. They are also beneficial in research applications where non-contact temperature measurement is required.