Product Description
Small-volume samples need a filter holder that keeps losses low and setup simple. This 25 mm vacuum filtration assembly is sized for analyzing particulate or microbiological contamination in modest volumes, with a 15 mL funnel and a fritted glass support that spreads vacuum evenly beneath the membrane.
This listing is for Wheaton catalog number 419325: 25mm Filtration Assemblies With No. 5 Stopper Connections and Fritted Glass Support. The funnel clamps onto a fritted base with 40-60 micron porosity, and the assembly seals into a filter flask through a No. 5 stopper connection. Glass components are WHEATON 33 low extractable borosilicate meeting USP Type I and ASTM E438 Type I, Class A. Flasks are sold separately and use a #2 hose connection for 1/4 in ID tubing. Order it from LIGHT LABS and keep your lab stocked with genuine DWK Life Sciences products.
Key Features
- Fritted glass support – 40-60 micron frit supports the membrane and distributes vacuum evenly.
- 15 mL funnel – Sized for small sample volumes.
- No. 5 stopper connection – Fits standard filter flasks with a No. 5 stopper joint.
- Low extractable glass – Meets USP Type I and ASTM E438 Type I, Class A requirements.
Specifications
| Catalog Number | 419325 |
| Brand | Wheaton (DWK Life Sciences) |
| Description | 25mm Filtration Assemblies With No. 5 Stopper Connections and Fritted Glass Support |
| Sold As | Each |
| Glass Type | WHEATON 33 low extractable borosilicate |
| Glass Standard | USP Type I; ASTM E438 Type I, Class A |
| Filter Diameter | 25 mm |
| Funnel Capacity | 15 mL |
| Frit Porosity | 40-60 micron |
| Flask Connection | No. 5 stopper |
Applications
- Particulate contamination analysis
- Microbiological membrane filtration
- Small-volume sample filtration
- General laboratory filtration
