Pyrometer

A pyrometer is a device capable of measuring the temperature of a substance without having to be in contact with it. The term is usually applied to those instruments capable of measuring temperatures above 600 degrees Celsius. The temperature range of a pyrometer is between -50°C (Degrees Celsius) to +4000 degrees Celsius. A typical application is the measurement of the temperature of incandescent metals in steel mills or foundries.

Inventor

It is unknown exactly, since historically the invention is granted to Pieter van Musschenbroek and Josiah Wedgwood, independently, since they developed devices very similar to what is known today as a pyrometer.

Basic principle: One of the most common pyrometers is the absorption-emission pyrometer, which is used to determine the temperature of gases by measuring the radiation emitted by a calibrated reference source, before and after that this radiation has passed through the gas and has been partially absorbed by it. Both measurements are made in the same wavelength range.

To measure the temperature of an incandescent metal, you observe it through the pyrometer, and rotate a ring to adjust the temperature of an incandescent filament projected into the field of view. When the color of the filament is identical to that of the metal, the temperature can be read on a scale based on the color setting of the next contestant.