Syringe Filter

Microfil Syringe Filter

Microfil™ Syringe Filter is designed for high-particulate samples requiring rapid throughput and reduced thumb pressure. Available in 17 mm and 33 mm diameters with a GF prefilter layer, it maintains low extractables and high pressure resistance for routine and demanding sample preparation in HPLC, GC and analytical workflows. The injection-moulded sealing and colour-coded rim allow quick identification of membrane type and pore size at the bench.

17 mm and 33 mm sizes with a GF prefilter layer handle high particulate loads and increase sample volume throughput
Injection-moulded sealing withstands 6 bar at 23 C, preventing housing failure during high-pressure filtration
Colour-coded rim enables immediate visual identification of membrane type and pore size without reading labels
Nine membrane options including Nylon, PTFE, PVDF, CA, MCE, PES, RC, PP and GF cover aqueous, organic and mixed solvent matrices

Key Benefits

What This Product Gives You

17 mm and 33 mm sizes with a GF prefilter layer handle high particulate loads and increase sample volume throughput
Injection-moulded sealing withstands 6 bar at 23 C, preventing housing failure during high-pressure filtration
Colour-coded rim enables immediate visual identification of membrane type and pore size without reading labels
Nine membrane options including Nylon, PTFE, PVDF, CA, MCE, PES, RC, PP and GF cover aqueous, organic and mixed solvent matrices
Large filtration area of 1.65 cm² (17 mm) and 5.39 cm² (33 mm) reduces filtration time and pressure build-up

GF prefilter layer improves flow rate and extends filter life with high particulate samples
Injection-moulded sealing provides a robust seal that withstands 6 bar at 23 C
Colour-coded rim allows instant visual confirmation of membrane type and pore size
Filtration area of 1.65 cm² (17 mm) and 5.39 cm² (33 mm) supports higher sample volumes
Female luer lock inlet and male luer slip outlet ensure compatibility with standard syringes

Where It Is Used

Applications And Buyers

Application Scenarios

Filtering heavily particulate-laden environmental water samples before ion chromatography
Preparing crude extracts and fermentation broths with high solids content for HPLC analysis
Processing pharmaceutical bulk drug substances with high particulate load before dissolution testing
Handling food and beverage samples with suspended solids or lipid content in residue analysis
Supporting high-throughput screening in R&D labs where sample volume and speed are critical

Who It Is For

Pharmaceutical and biotech labs processing high-particulate samples requiring fast filtration
Environmental testing labs handling soil leachates, sludge extracts and industrial effluents
Food and beverage labs analysing oils, beverages and processed foods with suspended matter
Contract testing labs needing consistent performance across multiple sample types and volumes
Lab distributors sourcing a single filter family with multiple membranes and large filtration area

Problems It Solves

Filters clogging too quickly when processing samples with high particulate load
High thumb pressure required to push viscous or particle-laden samples through standard syringe filters
Inconsistent results due to membrane degradation or extractables in gradient HPLC runs
Analysts misidentifying pore size or membrane type because of unmarked housings
Need to switch between multiple filter types and geometries for different sample matrices

Data

Specifications

Filter Media	Nylon, PTFE, Hydrophilic PTFE, MCE, RC, CA, PES, PVDF, Hydrophilic PVDF, GF
Housing	PP
Diameter	17 mm, 33 mm
Filtration Area	1.65 cm2 (17 mm), 5.39 cm2 (33 mm)
Pore Size	0.1, 0.22, 0.45, 1.0, 3.0, 5.0 micron
Sealing Technology	Injection molding
Max Operating Pressure	6 bar at 23 C
Inlet / Outlet	Female inlet lock / male outlet slip
Packing	100 pcs per pack

Materials

Membrane selected per application: Nylon, PTFE, Hydrophilic PTFE, MCE, RC, CA, PES, PVDF, Hydrophilic PVDF, GF

Customization Options

Choice of nine membranes across 0.1 to 5.0 micron pore sizes
17 mm and 33 mm housing diameters with GF prefilter layer
OEM printing and private-label packing through the Microlab OEM division
OEM contract manufacturing and membrane die-cut and packing for filter brands

How It Is Made

Manufacturing And Quality Control

Manufacturing Process

Membrane die cutting for precision sizing
Injection moulding of the housing and sealing
Assembly of the GF prefilter layer and primary membrane
Colour coding and rim printing for visual identification
Packing at 100 pieces per pack

Quality Control

Membrane and housing inspected before assembly
Sealing integrity tested against 6 bar at 23 C
Pore size and membrane type verified against the printed part number
Visual inspection of colour coding and rim marking for consistency

Comparison

Compared With The Alternatives

Versus Standard syringe filters without prefilter

The GF prefilter layer reduces clogging and increases flow rate for high-particulate samples, reducing the need for multiple filter changes

Versus Solvent-bonded housings

Injection-moulded sealing avoids adhesive residues in the flow path and maintains a 6 bar pressure rating

Versus Filters with no colour coding

The colour-coded rim allows immediate identification of membrane type and pore size at the bench, reducing human error

Versus Smaller diameter filters (e.g. 13 mm)

The 17 mm and 33 mm sizes offer larger filtration areas, which improves throughput and reduces pressure build-up with high-volume samples

Use Guide

How To Use It

Select membrane based on sample chemistry: PTFE and PP for aggressive solvents, PES and MCE for aqueous samples, Nylon and RC for mixed phases
Use 17 mm for moderate sample volumes and 33 mm for high-volume or high-particulate samples
Use 0.45 micron for routine HPLC clean-up and 0.22 micron for sterile-grade or fine particulate removal
Attach syringe to female luer lock inlet, expel air, and filter at a steady rate
Discard first drops if method is sensitive to membrane wetting solvent
Do not exceed 6 bar at 23 C; if pressure rises sharply, switch to a larger diameter or coarser pore size

Photos

Product Gallery

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FAQ

Questions Buyers Ask

Which membrane should I use for organic solvent samples?

Use hydrophobic PTFE or PP for aggressive organic solvents. Hydrophilic PTFE and PVDF are suitable for mixed aqueous and organic phases.

What is the difference between 17 mm and 33 mm filters?

The 17 mm filter has a 1.65 cm² filtration area and suits moderate volumes. The 33 mm filter has 5.39 cm² and handles larger volumes or higher particulate loads before clogging.

Can I use this filter for sterile filtration?

Yes, use 0.22 micron pore size with hydrophilic membranes such as PES, PTFE, or PVDF for sterile-grade clarification.

What is the purpose of the GF prefilter layer?

The GF prefilter layer captures large particles, reduces clogging, increases flow rate, and extends filter life for high-particulate samples.

How are the filters packed?

All filters are packed in 100 pieces per pack. Each housing has a colour-coded rim for immediate visual identification of membrane type and pore size.

Do you offer private-label options?

Yes. The Microlab OEM division provides OEM printing, private-label packing, and contract manufacturing for filter brands and lab distributors.