A pyrometer is a temperature measuring device, which may consist of several different arrangements. Temperature is also the name of a song by Sean Paul. ...

A simple type of pyrometer uses a thermocouple placed either in the furnace or on the item to be measured. The voltage output of the thermocouple is read from a digital or analog meter calibrated in degrees Celsius (C) or Fahrenheit (F). There are many different types of thermocouple available, and these can be used to measure temperatures from -200 degrees C to above 1500 degrees C. In electronics, thermocouples are a widely used type of temperature sensor and can also be used as a means to convert thermal potential difference into electric potential difference. ... A degree Celsius (°C) is a unit of temperature named after the Swedish astronomer Anders Celsius (1701-1744), who first proposed a similar system in 1742. ... Fahrenheit is a temperature scale named after the German physicist Gabriel Fahrenheit (1686–1736), who proposed it in 1724. ...

The term can also be applied to the so-called optical pyrometer, a class of non-contact instruments measuring temperatures above 600 degrees Celsius. These are typically used to measure temperatures of glowing hot metals in a steel mill or foundry. See also the infrared thermometer section of WikiPedia. Hot metal work from a blacksmith Look up Metal in Wiktionary, the free dictionary. ... A steel mill at the turn of the century in Pittsburgh, Pennsylvania A steel mill (British English and Australian English steelworks) is an industrial plant for the manufacture of steel. ... This article is about the factory that makes castings of metal. ... This article or section does not cite its references or sources. ...

One of the most common non-contact pyrometers is the absorption-emission pyrometer which is a thermometer for determining gas temperature from measurement of the radiation emitted by a calibrated reference source before and after this radiation has passed through and been partially absorbed by the gas. Both measurements are made over the same wavelength interval. A thermometer is a device which measures temperature or temperature gradient, using a variety of different principles. ... Radiation has a variety of different meanings. ... The wavelength is the distance between repeating units of a wave pattern. ...

To measure the temperature of incandescent metals, you look through the pyrometer at the glowing metal, and turn a knob or ring which adjusts the temperature of a glowing filament projected into your field of view. When the color of the filament matches the color of the metal, you can read the temperature from a scale on the filament color adjusting knob/ring.

The more common name for this type of instrument ia a Disappearing Filament Pyrometer (D.F.P). DFP's were very dependant upon operator judgement in deciding when the filament had disappeared and often two people would not be able to agree on the temperature.

D.F.P's are now old technology which have been replaced by modern Portable Infrared instruments which typically use a silicon sensor to measure the incoming radiation and have optical viewfinders with the temperature displayed in them.These instruments are state of the art with such features as emmisivity correction digital readout data logging etc. Certain instruments are manufactured to work at specific wavelengths for measuring difficult targets such as plastics and other materials.