The Italian company Maselli develops and produces since 1948 high quality refractometers and proces analyzing systems for the beverage and beer industrt. Their product range consists of laboratory refractometers, inline refractometers (in pipes and in tanks), laboratory analyzing systemes and inline analyzing systems. The advantage of the refractometer technology is that these systems (compared to other measurement techniques) have no drift. The inline (and laboratory) systems are giving a continueus reliable measurement value.