Range Extension to 5.5 for TRD

This is an option for Heiland TRD 2 and TRD Z.

Enables measurement on graphic films or process control in technical processes.
A power LED with approx. 6500 Kelvin and the selected measuring sensor extend the measuring range to 5.5 logD. This corresponds to about 3 PPM (parts per million) of unobstructed light transmission.