Includes
The Lovibond Nessleriser Systems are based on the Comparator 2000+. They have a longer path length and are capable of measuring concentrations below the sensitivity of the standard Comparator.
Like the Comparator 2000+ the Nessleriser Systems include a prism to allow color matching in a single field of view. Systems use either natural light or an electronic daylight unit for a consistant light source.
2150 systems use cells with a path length of 113mm and are compatible with any Comparator 2000+ disc with the prefix "N".