This is an option for Heiland TRD 2 and TRD Z.
Enables the measurement of very dense originals or coatings, e.g. for process control in technical processes such as the production of black foils or coating of glass. A high-intensity white LED with 6000 Kelvin and selected measuring receivers extend the measuring range to 6.5 logD. This corresponds to about 0.3 PPM (Parts Per Million) of unobstructed light transmission.
Please note: This option can not be combined with the multi-color LED option. If the aperture is smaller than 3mm, the measuring range is smaller.
