Whatman 1827-185 Filter Circles, 185mm Dia, Binder Free Grade 934-AH, 100/pk (PN:1827-185)

These glass microfiber filters are widely used for total suspended solids (TSS) analysis, water quality testing, air pollution monitoring, and laboratory filtration of highly particulate samples. They are a standard choice in environmental and analytical laboratories.

Grade 934-AH filters offer a nominal particle retention of approximately 1.5 µm, making them effective for capturing fine particulates while still maintaining fast filtration speeds.

These filters are made from binder-free borosilicate glass microfiber, which provides high chemical resistance, low extractables, and minimal interference in analytical results. The binder-free structure ensures purity during sensitive testing.

Yes, 934-AH filters can withstand temperatures up to approximately 500–550°C, making them ideal for gravimetric analysis, ignition procedures, and testing that involves high heat.

The 185 mm diameter provides a larger filtration surface area, allowing higher flow rates and greater loading capacity. This makes them especially effective for filtering turbid or high-particulate samples without clogging quickly.