FILTER PAPER CIRCLES WHATMAN GRADE NO.4 9CM DIA BOX 100 Weight Sets UKAS Certificate depending on vertical or horizontal

depending on vertical or horizontal immersion and the liquid or broth viscosity

external dimensions: 271 x 332 x 170mm W x D x H

Bottle diameter x height 227 x 414mm

These baths require a clean air supply at a pressure of 21KN/m2  (3psi) and maximum flow of 57 litres/minute

External calibration using accessory weight

FILTER PAPER CIRCLES WHATMAN GRADE NO.4 9CM DIA BOX 100 Weight Sets UKAS Certificate depending on vertical or horizontalQualitative Grade Grade No. Flowrate Retention microns Wet strength Thickness, mm Ash % 4 Excellent retention of coarse and gelatinous precipitates Fast 20 25 Low* 0. 21 0. 06 *Suitable for gravity or low suction filtration. Care must be taken to prevent rupture of the paper.