Lab Filtration Products

Filter Monitor

It consists of a 47 mm diameter filter funnel with a removable lid and plug, a base, a gridded MCE membrane, and a pad, all designed to convert easily into a petri dish for colony counting. The system is available in white or black gridded MCE membranes with pore sizes of 0.22, 0.45, or 0.8 micron, and is individually packed and gamma sterile. It supports volume filtration up to 100 ml and is suitable for use with aqueous and solvent-based samples.

Converts directly into a petri dish for colony counting without transferring the sample, reducing contamination risk
Gridded MCE membrane allows visual quantification of particles or colonies by area, improving data consistency
Available in both white and black gridded membranes for enhanced contrast depending on sample matrix
Individually packed and gamma sterile, so no additional sterilisation is required before use

Key Benefits

What This Product Gives You

Converts directly into a petri dish for colony counting without transferring the sample, reducing contamination risk
Gridded MCE membrane allows visual quantification of particles or colonies by area, improving data consistency
Available in both white and black gridded membranes for enhanced contrast depending on sample matrix
Individually packed and gamma sterile, so no additional sterilisation is required before use

47 mm diameter filter funnel with base, removable lid, and plug
Gridded MCE membrane with pore sizes of 0.22, 0.45, or 0.8 micron
Volume capacity of 100 ml per unit
Individually packed and gamma sterile
Compatible with aqueous and solvent-based liquids
Removable lid and plug allow for easy transfer to a petri dish after filtration
Available in both white and black gridded membranes for improved visual contrast

Where It Is Used

Applications And Buyers

Application Scenarios

Monitoring particulate levels in cell culture media before bioreactor inoculation
Testing the integrity of filtered process liquids in pharmaceutical manufacturing
Assessing microbial load in water for injection (WFI) or purified water systems
Supporting environmental monitoring in cleanrooms and controlled manufacturing areas

Who It Is For

Pharmaceutical and biotechnology QC labs performing routine environmental and media monitoring
R&D labs evaluating filter performance or process fluid purity during process development
Laboratory managers seeking a low-cost, disposable system that converts to a petri dish
Contract testing labs needing a consistent, traceable method for monitoring liquid purity

Problems It Solves

Difficulty in quantifying particles or colonies due to lack of grid reference on standard filters
Risk of cross-contamination when transferring filtered samples to a separate petri dish
Inconsistent results from non-sterile or bulk-packed filters used in sensitive environments
Lack of a standardised, disposable system for routine monitoring of process liquids
Inability to visually assess contamination patterns without additional imaging or counting steps

Data

Specifications

Diameter	47 mm
Volume Capacity	100 ml
Pore Size	0.22, 0.45, 0.8 micron
Membrane Type	MCE gridded
Membrane Colour	White, Black
Sterility	Gamma sterile
Packing	Individual packed
Filter Funnel Material	Polystyrene or Polypropylene
Base and Lid	Included with each unit

Materials

Polystyrene or Polypropylene for the filter funnel, base, lid, and plug
MCE gridded membrane for particle and microbial capture

Customization Options

Choice of white or black gridded MCE membrane
Selection of pore size: 0.22, 0.45, or 0.8 micron
OEM private-label printing available through the Microlab OEM division
Custom packing configurations possible for bulk orders

How It Is Made

Manufacturing And Quality Control

Manufacturing Process

Die-cutting of the MCE gridded membrane to 47 mm diameter
Assembly of the funnel, membrane, pad, base, lid, and plug
Sterilisation via gamma irradiation
Individual packing in sealed packaging
Labeling with part number and pore size

Quality Control

Visual inspection of the membrane for defects before assembly
Verification of pore size and membrane type against the part number
Sterility confirmation through gamma irradiation validation
Inspection of individual packaging integrity before dispatch
Verification that the gridded pattern is consistent across all units

Comparison

Compared With The Alternatives

Versus Standard flat filters

The Filter Monitor includes a gridded membrane and a sealed funnel system, enabling direct conversion to a petri dish without sample transfer, unlike flat filters that require secondary handling.

Versus Reusable filtration systems

The Filter Monitor is single-use and gamma sterile, eliminating cleaning, re-sterilisation, and carry-over risks that reusable systems introduce.

Versus Non-gridded membranes

The gridded pattern allows direct visual quantification of particles or colonies by area, improving consistency compared to non-gridded membranes that require counting software or manual tracing.

Versus Bulk-packed filters

Individual packing ensures sterility and traceability per unit, reducing contamination risk compared to bulk-packed filters that may be exposed during handling.

Use Guide

How To Use It

Assemble the filter funnel with the MCE gridded membrane and pad, then place it on the base
Place the removable lid on top and secure with the plug to prevent leakage
Pour the liquid sample (up to 100 ml) into the funnel and allow gravity filtration
After filtration, remove the lid and plug, then invert the funnel onto a standard petri dish
Use the grid pattern to count particles or colonies directly on the membrane surface
Discard the unit after use; do not reuse or re-sterilise
Store in a dry, cool place until use; avoid exposure to moisture or direct sunlight

FAQ

Questions Buyers Ask

What is the purpose of the gridded membrane?

The gridded pattern allows for visual quantification of particles or colonies by area, enabling consistent and repeatable counting without additional imaging tools.

Can the Filter Monitor be used for microbial monitoring?

Yes. The 0.22 micron and 0.45 micron pore sizes are suitable for capturing bacteria and other microorganisms, and the system can be converted into a petri dish for colony growth and counting.

Is the Filter Monitor sterile?

Yes. Each unit is individually packed and gamma sterile, so it is ready for use without additional sterilisation.

What materials are used in the filter funnel and base?

The funnel, base, lid, and plug are made from polystyrene or polypropylene, depending on the product variant.

Can I use this for solvent-based samples?

Yes. The MCE membrane and polystyrene or polypropylene components are suitable for use with aqueous and solvent-based liquids, but compatibility should be verified for aggressive solvents.

How do I convert the Filter Monitor into a petri dish?

After filtration, remove the lid and plug, then invert the funnel onto a standard petri dish. The membrane remains in place and can be used for direct visual inspection or incubation.