NANOCOLOR® Turbidity (Formazine/DIN) Photometrische Bestimmung von Trübungen The turbidity of the pure sample is measured photometrically. NANOCOLOR® photometers are programmed with all necessary calibration date to express turbidity as the spectral absorbance coefficient 1/m or in internationally valid Formazine Attenuation Units (FAU) which are based on formazine standard suspensions. Read More »