Dual Membrane Filter
1. Dual-layer membrane technology — two distinct filtration layers in a single device for enhanced particle retention and throughput
2. Available in multiple pore sizes (0.22 µm, 0.45 µm, 0.8 µm) and membrane materials (PES, PTFE, nylon, MCE) for diverse laboratory applications
3. Pre-filter and final filter combination extends filter life and reduces premature clogging in particle-laden solutions
4. Compatible with standard syringe filter holders and vacuum filtration assemblies for seamless laboratory workflow integration
5. Individually packaged sterile and non-sterile options available for cell culture, HPLC sample preparation, and general laboratory filtration
6. CE marked and manufactured under ISO 9001 quality management standards; bulk quantities available for institutional procurement
Product Overview
The Dual Membrane Filter incorporates two distinct filtration layers in a single device, providing enhanced particle retention, extended filter life, and improved throughput compared to single-membrane filters. The dual-layer design combines a pre-filter layer for large particle removal with a final membrane for precise size-exclusion filtration. Suitable for HPLC sample preparation, cell culture media sterilization, particulate analysis, and general laboratory clarification applications.
Dual Membrane Filter for Laboratory Filtration
Key Takeaway: Roundfin Dual Membrane Filter — Roundfin quality. CE marked, ISO 13485 certified. Bulk pricing and OEM/ODM customization available for institutional procurement. Worldwide shipping.
Technical Specifications
| Parameter | Specification |
|---|---|
| Pore Sizes | 0.22 µm, 0.45 µm, 0.8 µm (final membrane); pre-filter pore size matched to application |
| Housing Material | Medical-grade polypropylene; chemical-resistant |
| Sterilization Options | Non-sterile, gamma-sterilized, or EtO-sterilized |
| Certifications | CE marked; ISO 9001; USP Class VI compliant materials |
Key Features
- Dual-Layer Enhanced Filtration — Pre-filter captures large particles and aggregates, preventing premature clogging of the final membrane and extending total filter throughput by up to 3x compared to single-membrane filters.
- Multiple Membrane Materials — PES for low protein binding and high flow rates; PTFE for organic solvent and aggressive chemical compatibility; Nylon for general aqueous and organic HPLC; MCE for particulate analysis and general clarification.
- Three Pore Size Options — 0.22 µm for sterilization-grade filtration and bacterial removal; 0.45 µm for general clarification and particulate removal; 0.8 µm for pre-filtration and large particle removal.
- Standard Laboratory Formats — Available in 13 mm, 25 mm, and 47 mm diameters compatible with all major syringe filter holders, vacuum filtration manifolds, and inline filter housings.
- Sterile & Non-Sterile Options — Gamma or EtO sterilized options for cell culture and sterile applications; non-sterile for HPLC, environmental testing, and general lab use.
- Chemical-Resistant Housing — Medical-grade polypropylene housing compatible with aqueous solutions, organic solvents, acids, and bases across pH 1-14.
FAQ
What is the advantage of a dual membrane filter over a single membrane?
A dual membrane filter incorporates a pre-filter layer upstream of the final membrane. The pre-filter captures large particles, aggregates, and debris that would rapidly clog a single-membrane filter. This extends the total throughput (volume filtered before clogging) by 2-3x and reduces the number of filter changes needed when processing particle-laden solutions. The dual-layer design is particularly beneficial for environmental water samples, tissue homogenates, and proteinaceous solutions.
Which membrane material should I choose for my application?
PES is recommended for aqueous biological samples, cell culture media, and protein solutions due to its low protein binding and high flow rate. PTFE is ideal for organic solvents, HPLC mobile phases, and aggressive chemical filtration. Nylon is a general-purpose membrane suitable for both aqueous and organic HPLC sample preparation. MCE is commonly used for particulate analysis, water quality testing, and general clarification where low cost is a priority.
Are these filters compatible with syringe filtration?
Yes. The 13 mm and 25 mm diameter filters are designed for standard Luer-lock and Luer-slip syringe filtration. The 47 mm format is designed for vacuum filtration manifolds and inline filter holders. Always moisten the membrane with the sample solvent before filtration and do not exceed the maximum operating pressure of 4.5 bar (65 psi) at room temperature.
Can I order custom membrane configurations or packaging?
Yes. Roundfin offers OEM/ODM custom filter production including specific membrane material combinations, custom pore sizes, non-standard diameters, bulk packaging configurations, and private-label branding. Minimum order quantities for custom production typically start at 1,000-5,000 units depending on customization requirements. Contact Roundfin for a custom filter specification and quotation.
