SCHMIDT + HAENSCH’s fully automatic pressure filtration unit AutoFilt Z is unleaded, hence works without clarifying agent, avoiding environmentally hazardous clarification chemicals which normally are used for the clarification of highly colored sugar samples. Filtration units are a necessary and useful complement to the SCHMIDT + HAENSCH polarimetric sugar analysis. AutoFilt Z filters all undissolved solids and significantly shortens the filtration of sugar samples.