EZ-Fit® Filtration Units for Bioburden Testing

Microbial testing won’t be a burden when you use EZ-Fit® Filtration Units. Our sterilized, disposable filtration devices for bioburden testing can streamline your workflow, save time and give you highly reliable microbial enumeration results. Filter your liquid sample, then transfer the membrane onto an agar plate or add liquid media from an ampoule to culture the captured organisms.

EZ-Fit® pink units come with a wide range of membranes from 0.22 to 0.8 μm for maximum versatility to suit all applications. The new patented drain design speeds up processing of turbid and hard-to-filter matrices.

EZ-Fit® blue units give you extra flexibility: after filtration, either transfer the membrane to an agar plate or add liquid media and convert the device into a Petri dish.

Both the blue and pink EZ-Fit® Filtration Units are available in different variants to suit your application:

  • 100 mL or 250 mL funnels
  • Black or white, gridded or plain membranes, made of mixed cellulose esters or PVDF (polyvinylidene fluoride)
  • Bagged individually, in multipacks of 4 units (pink version only) or packaged in bulk (with or without protective bag)

Ready-to-use filtration units for reliable microbial enumeration

Ready-to-use EZ-Fit® filtration units for reliable microbial enumeration

Optimal microbial recovery

The drain support and the funnel-to-base assembly on both the blue and pink units has been optimized so that the membrane remains perfectly flat after sample filtration. When transferred to the culture medium, the whole filtration surface of the membrane stays in perfect contact with the culture media.

There are no folds or wrinkles, so optimal microbial recovery is ensured. The funnel’s shape and the properties of its hydrophobic material minimizes sample residue, ensuring that the complete sample volume reaches the membrane surface.

The innovative funnel assembly design prevents leakages and liquid sample from bypassing the membrane.

The EZ-Fit® Filtration Units conform to international standards (EP/USP/ISO standards) and comply with water testing regulations.


Lower risk of false positive results

The filtration device should help to protect your sample from contamination during processing. The EZ-Fit® Filtration Unit’s design reduces the risk of accidentally touching the membrane filtration area with the forceps during membrane transfer and allows you to filter with the lid in place.

EZ-Fit® Filtration Unit’s design reduces the risk of accidentally touching the membrane filtration area

Smart transformation: turn your filtration unit into a Petri dish

If using blue base units, liquid media can be added so there is no need to transfer the membrane. Simply remove the funnel and the unit converts into a Petri dish, ready for incubation.

Smart transformation: turn your EZ-Fit® filtration unit into a Petri dish

Streamline your membrane filtration method

We worked with membrane filtration users around the world and across industries to make the EZ-Fit® filtration unit more ergonomic and convenient, resulting in a device that sets the benchmark for ease of use.

  • Transparent filter funnel with all-around filling level indicators
  • Simple transfer of the membrane to the agar plate with forceps
  • One-handed removal of the funnel
  • 250 mL funnels for larger volume samples
  • Stackable units to save space in the work area


Filtration unit technical specifications

Construction Materials Cover Polystyrene
  Funnel Styrene butadiene copolymer (SBC)
  Membrane Mixed cellulose esters, PVDF
  Support pad (blue unit) Cellulose
  Base Acrylonitrile butadiene styrene
  Plug (bulk blue units) Low-density polyethylene
Height 100 mL 66.5 mm (2.6 in.)
  250 mL 108.5 mm (4.3 in.)
Largest diameter   75.8 mm (3.0 in.)
Filtration Surface   12.56 cm2
Sterilization Method Blue Units Ethylene Oxide (EO)
  Pink Units e-beam


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