FILTER PAPER CIRCLES WHATMAN GRADE NO.4 9CM DIA BOX 100 Weight Sets UKAS Certificate external dimensions: 271 x 332

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

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

Small footprint and compact design

Alternatively when using liquid or discard cycles waste water can be fed to an external vent rather than the drain bottle

FILTER PAPER CIRCLES WHATMAN GRADE NO.4 9CM DIA BOX 100 Weight Sets UKAS Certificate external dimensions: 271 x 332Qualitative 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.