Whatman 10347009 Filter Circles, 90mm Dia, 8 Ruled, 100/pk

These filter circles are designed for qualitative filtration and particle analysis, particularly in applications where visual inspection of particles or contaminants is required, such as environmental testing, food analysis, and general lab workflows.

“8 ruled” refers to printed grid lines (typically spaced at 5 mm intervals) on the filter surface. These lines help divide the filter into sections, making it easier to count particles and assess distribution during analysis.

These filters are made from high-quality cellulose, which provides consistent filtration performance and good liquid flow rates for routine laboratory applications.

Ruled filter paper improves accuracy and repeatability in particle counting, especially under a microscope. It helps users quickly locate and quantify contaminants, making it ideal for analytical and educational use.

Yes, the 90 mm diameter is a standard size that fits most laboratory funnels and vacuum filtration setups, allowing easy integration into existing workflows without special adapters.