Turbidity is a measure of the degree to which water loses clarity due to the presence of suspended particles that scatter or absorb transmitted light, In laboratories, samples from the food industry, environmental monitoring, sewage treatment and drinking water plants are part of the routine. Regular analysis of samples is mandatory for many different applications, and therefore a wide range of different turbidities are analysed in laboratories. Here, turbidity can be used as an indicator to validate the effi ciency of processes, for functional control of on-line instruments and for quality control of products., Laborites on rutiini osaks toiduainetööstuse, keskkonnaseire, reoveepuhastuse ja joogiveetehaste proovid. Proovide regulaarne analüüsimine on kohustuslik paljude erinevate rakenduste puhul ja seetõttu analüüsitakse laborites väga erinevaid hägususi. Siin saab hägusust kasutada indikaatorina protsesside tõhususe valideerimiseks, on-line instrumentide funktsionaalseks kontrolliks ja toodete kvaliteedikontrolliks., analüüs, mis on kohustuslik paljude erinevate rakenduste puhul, analysis of samples that is mandatory for many different applications