Vacuum Filter Holders

Photo of Nalgene 300 Series Reusable Filter Holders with Receiver-Polysulfone

Nalgene 300 Series Reusable Polysulfone Filter Holders with Receiver eliminate the need for a manifold and/or breakable glass vacuum flask. Receiver is graduated. Two side-arms allow connection to vacuum line; also accept syringe filters. Chamber accommodates 47 or 50mm membranes (not included). Tubing adapter can be stuffed with cotton for sterile venting; accepts 1/4-in. to 5/16-in. (6- to 8-mm) I.D. vacuum tubing. Cover allows convenient storage of sterile filtrate. WARNING! All NALGENE Filterware is for research use only, not for in vitro diagnosis or parenterals.

Designed by Dr. H.E. Morton of the University of Pennsylvania, this convenient 250mL PYREX® bacteria-filtering assembly has an ultra-fine porosity (0.9 to 1.4µm) fritted disc that eliminates the need for rubber stoppers and the usual difficulties encountered when sterilizing rubber. Bacteria-free solutions are obtained as a result of the following design features: -The 10mm sidearm on the apparatus permits the insertion of a plug. -A recess at the bottom of the outer ground joint also allows a plug. -The unit will withstand the repeated autoclaving usually employed in laboratories.