Lovibond NSH Hazen Scale Disc, 10-9010 90 mg L, Nesselriser 2150 Easy to use, visual assessment of the sample simply rotate disc for colour match Manufactured for longevity of use Optional lighting units for guaranteed lighting conditions 24 hours a day Optional Nessleriser systems for longer path lengths Disc Parameter Reading 10, 20, 30, 40, 50, 60, 70, 80, 90 More than 400 colour discs are available for the Comparator 2000. Description Resistance The colour standard are manufactured