Description
Filter plate, biplanar, 280 mm, Por. 4 is a VitraPOR® glass filter disc made from borosilicate glass 3.3 for controlled laboratory filtration. It features a diameter of 280 mm, porosity grade 4 and a thickness of 18,0 mm with a tolerance of ± 0,5 mm. The working faces are ground to deliver exact thickness and a plane-parallel surface, promoting consistent seating and even flow across the disc. Available as one piece from manufacturer ROBU - Stereon, this biplanar plate is intended for filtration assemblies that demand a defined pore grade together with tight dimensional control. Borosilicate glass 3.3 offers reliable chemical resistance and thermal stability for everyday laboratory media. Porosity 4 provides a finer pore range than coarser grades, supporting applications that need tighter particle retention or finer clarification. The 280 mm format suits larger holders and higher sample volumes, while the ground, plane-parallel geometry aids sealing and mechanical fit. Designed for research, analytical and process laboratories seeking durable glass filter media with precise biplanar geometry and porosity 4 performance.
This article is part of Sintered glass filter plates & discs, in Filtration.
Key features
- Pack size: 1 pc
- Product type: Biplanar glass filter plate
- Brand: VitraPOR®
- Material: Borosilicate glass 3.3
- Diameter: 280 mm
- Porosity: 4
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Questions about Filter Disc, bi-plane, 280 mm, Por. 4 Thickness 18.0 mm ± 0.5 mm
What is this article?
Filter Disc, bi-plane, 280 mm, Por. 4 Thickness 18.0 mm ± 0.5 mm is the article on this page. Luminix Health distributes ROBU - Stereon for laboratory use. It sits in Sintered glass filter plates & discs, inside Filtration, in Lab consumables.
A sintered glass filter is a disc of fused glass particles with a porosity grade, often 0 to 5, from coarse to fine. It is cleaned and reused. The porosity number, not a micrometre guess, is the specification. Hydrofluoric acid and strong alkali attack the glass.
Filtration holds back what is larger than the pores and lets the rest through. Paper is the ordinary laboratory filter. A membrane has a stated pore size and a polymer that must survive the solvent. A syringe filter is that membrane in a housing on a syringe. Glass fibre takes a higher dirt load. Ultrafiltration holds back macromolecules and passes salts. The pore size, the chemical compatibility and the volume are the three choices. Laboratory apparatus around filtration is indexed under ISO laboratory apparatus.
Which category should I open next?
The category is Filtration. The sub-category is Sintered glass filter plates & discs. The catalogue is Lab consumables.
Shelves beside this one are Filter paper, Syringe filters, Filter cartridges & capsules, Membrane filters, Glass & quartz fibre filters, Bottle-top & vacuum filtration units, Ultrafiltration & concentrators, Filtration accessories, Extraction thimbles and Dialysis tubing & devices.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Delivery across Europe, two to five days when 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. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.
