The optoNCDT 1700-750BL blue laser triangulation sensor from Micro-Epsilon can be used to measure steel profiles at a temperature of 1,200 °C. The sensor checks the dimensional accuracy of these profiles. The sensor checks the dimensional accuracy of these profiles. The center of the bar is measured at a material speed of 10 m/s. Glowing objects pose no problem: Matched optical filters block out the intrinsic radiation of the object being measured.