Büchner & filter funnels

Both are used for vacuum filtration with a flat filter plate. A Büchner funnel has a wide, flat plate and suits larger amounts of solid, such as collecting a precipitate or washing crystals. A Hirsch funnel is smaller with a sloping wall and a small plate, so little product is lost with small amounts. Examples: the porcelain Hirsch funnel, 50 mm, and the porcelain Hirsch funnel with a 27 mm filter plate, height 102 mm, 1 piece. For larger batches, see our Büchner and filter funnels.

Porcelain is robust, resists heat and most chemicals and is the classic choice for routine filtration, as in the porcelain Hirsch funnels. Glass lets you see the filter cake and clean it more easily: the Büchner funnels with slotted sieve plate, 500 ml, 95 mm plate, and 220 ml, 73 mm plate, are glass. Borosilicate glass 3.3 adds high thermal shock resistance, as in the DURAN® Büchner funnel with slotted sieve plate, 220 ml. For microbiology, sterile single-use funnels save cleaning and validation. Ask sales@luminixhealth.com.

Choose a round filter paper just smaller than the inner diameter of the filter plate, so it lies flat and covers all holes or slots without curling up the wall. Check the plate diameter on the product page: for example 95 mm on the glass Büchner funnel, 500 ml, and 73 mm on the 220 ml version. Wet the paper with a little solvent and apply vacuum before you pour in the suspension. For very small volumes there is a micro filter funnel, 2 ml, with a 10 mm P4 sintered plate. Questions: sales@luminixhealth.com.

A basic set-up has four parts: a funnel, a filter flask with side arm, a rubber adapter or cone that seals the funnel on the flask, and a vacuum source such as a pump or water jet pump, ideally with a trap bottle in between. Add the filter paper or membrane that suits your particle size. For microbiological water testing, a ready-made option is the sterile single-use analytical filter funnel, 250 ml, with 0.45 µm, 47 mm cellulose nitrate membrane, 50 pieces. Send your method to sales@luminixhealth.com and we will put the set together.

A Büchner funnel is a perforated porcelain or plastic plate used with a rubber cone and vacuum to pull liquid through a filter paper. A filter funnel is the glass cone that holds a folded paper under gravity. The plate diameter decides the paper size.

A funnel guides a liquid or a powder into a narrower mouth. A filter funnel holds a paper. A Büchner funnel is the flat perforated plate used with vacuum. A separating funnel has a stopcock so two liquid layers can be run off one at a time. A dropping funnel adds a reagent slowly into a reaction. The bore and the stopcock are the parts that matter. This glassware is listed under ISO laboratory glassware.

This shelf belongs to Funnels, inside Labware. Luminix Health distributes this range for laboratory use.

The neighbouring shelves are Funnels (plastic, glass & steel), Dropping funnels, Separating funnels and Powder funnels. The category above this shelf is Funnels.

Luminix Health distributes this range from the heart of Europe. We deliver across the EU in two to five days if in stock. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. Send a quote request, contact the team, or read who we are. The full brand index is on shop by brand.

The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology. If the article is not on the shelf, request a quote.