How MWx Pyrometers with Dynamic ESP Technology Work
Multi-wavelength pyrometers are used to measure the temperature of non-greybody materials. These are materials for which the emissivity not only varies but varies differently at different wavelengths.
Traditional multi-wavelength pyrometers use static, application-specific algorithms to compensate for complex emissivity characteristics. The MW pyrometers assume that the surface conditions for these applications are relatively consistent.
The Williamson MWx pyrometer uses Dynamic ESP Technology to compensate for more significant variation in surface character and conditions without adjustments.
For aluminum hot rolling mills, the surface character of the aluminum varies dramatically as it goes through the reversing mill, so the traditional MW technology is not appropriate.
For high temperature (<900°F/480°C) aluminum billets, there is an elemental migration of aluminum to the outside billet surface that dramatically changes the emissivity of the billet surface, which the traditional MW technology is not able to manage.