Due to their strong, fibrous and non-clogging nature, glass fiber filters are excellent pre-filters for a wide range of filtration, from basic liquid filtration to highly specialized gas and air filtration. These same properties make glass fiber filters excellent both as direct filters for purifying buffers, reagents, and protein solutions, as well as gravimetric, air monitoring, and wastewater analysis. Their 100% borosilicate construction gives the glass fiber filters an extremely clean and white appearance.

Quartz filters are made of specialized crystalline microfiber quartz material and represent state-of-the-art quartz technology. Sartorius quartz filters are 100% quartz crystal without any additives of glass micro fibers or binders which makes them very heat resistant and very clean. In addition, quartz filters, class Q3400 are hardened and remove all chemically combined water and give the filters excellent weight and stability. These highly specialized filters are particularly suitable for demanding situations where only the highest purity is required, and yet high durability and retention, such as emission control at temperatures up to 900 ° or other high temperatures, highly corrosive situations.