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Microsart® e.motion Membrane Filter Dispenser

The ability to accurately quantify microorganisms in liquids is of prime importance for any quality control laboratory. This is why membrane filtration is the established method of choice as it provides reliable and reproducible results.

Facilitate your microbiological testing procedures with the new Microsart e.motion dispenser: The membrane filters are released from their sterile packaging fully automatically at the touch of a button or hands-free or by foot switch: the choice is yours!

Choose your product

Products (2)

Microsart e.motion Dispenser, battery operated

$1,920.00

Power Requirements
One Lithium Battery (included)
Microsart e.motion Dispenser, Power-supply only

$1,640.00

Power Requirements
24 V DC, 40 VA (external power supply included)

Microsart e.motion dispenser - Sets things in motion!

Efficient and ergonomic workflows for reliable and fast membrane filter dispensing. Thanks to the small footprint the Microsart e.motion dispenser saves precious space under the laminar air flow which can be used for samples, media and funnels instead. The Microsart e.motion dispenser offers the easiest and most flexible way of membrane filter dispensing.
You have the freedom of choice between 3 different operation modes!

Choose what is most convenient for you:

  • push-button
  • foot-switch or
  • sensor mode

Efficient Workflow

The new Big Packs containing 250 membrane filters enable you to work a complete shift without the need to stop and reload the Microsart® e.motion dispenser.

The dispenser’s low weight and convenient handle makes it easy to remove or transport.

The membrane filter band specially designed for the Microsart® e.motion dispenser can be conveniently inserted, and changed quickly as needed.

A window in the field of dispensing makes the information on the membrane filter band such as lot number, membrane filter type and the quantity of filters left visible! For better scheduling of tests and easy traceability.

Applications

Microbiological Quality Control of liquid samples:

  • Beverages (beer, wine, softdrinks, bottled water)
  • Cosmetics
  • Pharmaceutical Analysis
  • (WFI, purified water, microbial limits testing of non-sterile products, bioburden testing)
  • Environmental Analysis (Water monitoring)

Microsart® Funnel 100
Microsart® Funnel 100
Item no.:   16A07--10------N

$141.00

Microsart® Funnels allow quick performance of the filtration steps required in the routine microbiological analysis of water, food and beverages, pharmaceutical and cosmetic products. A Sartorius gridded membrane filter is placed on a stainless steel filter support and a Microsart® Funnel is simply mounted by clicking it on. The funnels, available for various sample volumes, are made of polypropylene and are thus elastic enough to ensure optimal sealing with a click-fit closure.

Microsart® Funnel 250
Microsart® Funnel 250
Item no.:   16A07--25------N

$155.00

Microsart® Funnels allow quick performance of the filtration steps required in the routine microbiological analysis of water, food and beverages, pharmaceutical and cosmetic products. A Sartorius gridded membrane filter is placed on a stainless steel filter support and a Microsart® Funnel is simply mounted by clicking it on. The funnels, available for various sample volumes, are made of polypropylene and are thus elastic enough to ensure optimal sealing with a click-fit closure.

Malt extract NPS incl. Dispenserfilter
Malt extract NPS incl. Dispenserfilter
Item no.:   14050--50----RDN

$205.00

Sterile, dehydrated culture media which is individually inserted in a petri dish and sterilized

Azide NPS & e.motion MF, 0.45µm
Azide NPS & e.motion MF, 0.45µm
Item no.:   14051--47----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Medium Azide Nutrient Pad Set
Medium Azide Nutrient Pad Set
Item no.:   14051--50----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Endo NPS & e.motion MF, 0.45µm High Flo
Endo NPS & e.motion MF, 0.45µm High Flo
Item no.:   14053--47----RDN

$210.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Endo NKS & E.Motion MF, 0,45 µm High Fl
Endo NKS & E.Motion MF, 0,45 µm High Fl
Item no.:   14053--50----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Standard TTC NPS & e.motion MF, 0.45µm
Standard TTC NPS & e.motion MF, 0.45µm
Item no.:   14055--47----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Medium Standard TTC Nutrient Pad Set
Medium Standard TTC Nutrient Pad Set
Item no.:   14055--50----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Medium Tergitol Nutrient Pad Set
Medium Tergitol Nutrient Pad Set
Item no.:   14056--47----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Medium Wort Nutrient Pad Set
Medium Wort Nutrient Pad Set
Item no.:   14058--47----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Medium Tergitol Nutrient Pad Set
Medium Tergitol Nutrient Pad Set
Item no.:   14056--50----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Medium Wort Nutrient Pad Set
Medium Wort Nutrient Pad Set
Item no.:   14058--50----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Orange Serum NPS & e.motion MF, 0.45µm
Orange Serum NPS & e.motion MF, 0.45µm
Item no.:   14062--47----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Teepol Nutrient Pad Set
Teepol Nutrient Pad Set
Item no.:   14067--47----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Medium Orange Serum Nutrient Pad Set
Medium Orange Serum Nutrient Pad Set
Item no.:   14062--50----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Teepol Nutrient Pad Set
Teepol Nutrient Pad Set
Item no.:   14067--50----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

m-FC NKS & e.motion MF, 0,45µm
m-FC NKS & e.motion MF, 0,45µm
Item no.:   14068--50----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Cetrimide NPS & e.motion MF, 0.45µm
Cetrimide NPS & e.motion MF, 0.45µm
Item no.:   14075--47----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Medium Cetrimide Nutrient Pad Set
Medium Cetrimide Nutrient Pad Set
Item no.:   14075--50----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Nutrient Pad Sets, Medium TGE
Nutrient Pad Sets, Medium TGE
Item no.:   14076--47----RDN

$210.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Medium TGE Nutrient Pad Set, 100pk
Medium TGE Nutrient Pad Set, 100pk
Item no.:   14076--50----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Schaufus-Pottinger Nutrient Pad Set
Schaufus-Pottinger Nutrient Pad Set
Item no.:   14080--50----RDN

$210.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Nutrient Pad Set Type SCHAUFUS-POTTINGER
Nutrient Pad Set Type SCHAUFUS-POTTINGER
Item no.:   14080--47----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Malt extract NPS incl. Dispenserfilter
Malt extract NPS incl. Dispenserfilter
Item no.:   14086--50----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Schaufus-Pottinger NPS incl. Disp. mem.
Schaufus-Pottinger NPS incl. Disp. mem.
Item no.:   14091--47----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Yeast Extract NPS & gridded MF, 0.45µm
Yeast Extract NPS & gridded MF, 0.45µm
Item no.:   14090--50----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Schaufus-Pottinger NPS incl. Disp. mem.
Schaufus-Pottinger NPS incl. Disp. mem.
Item no.:   14091--50----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Wort NPS & e.motion MF, 0.45µm
Wort NPS & e.motion MF, 0.45µm
Item no.:   14092--50----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Orange Serum Nutrient Pad Set, pH 5.5
Orange Serum Nutrient Pad Set, pH 5.5
Item no.:   14094--50----RDN

$205.00

Sterile, dehydrated culture media which is individually inserted in a petri dish and sterilized

Orange Serum Nutrient Pad Set, pH 3.2
Orange Serum Nutrient Pad Set, pH 3.2
Item no.:   14096--47----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Orange Serum Nutrient Pad Set, pH 3.2
Orange Serum Nutrient Pad Set, pH 3.2
Item no.:   14096--50----RDN

$205.00

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Chromocult®* NPS & emotion MF, 0.45 µm
Chromocult®* NPS & emotion MF, 0.45 µm
Item no.:   14087--50----RDN

Nutrient pad sets - dehydrated media pads in petri dishes , pre-sterilized, along with suitable membrane filters for economical, time-saving microbiological quality control. No other ready-to-use culture media assures such consistently high quality and reproducible results up to 24 months.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   11403Z-47----SCM

$205.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   11403Z-50----SCM

$205.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   11406Z-47----SCM

$205.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.Microsart® e.motion membrane filter with 0.45 µm cellulose nitrate (CN) membrane for colony counting, particle testing and microscopy. The membrane filter is suitable for use in the Microsart® e.motion fiilter dispenser and is sterile-sealed without protective paper on top of each filter in a specially designed individual package on a band.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   11406Z-50----SCM

$205.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   11407Z-47----SCM

$205.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   11407Z-50----SCM

$205.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   114H6Z-47----SCM

$225.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   114H6Z-50----SCM

$225.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   13004Z-47----SCM

$205.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   13004Z-50----SCM

$205.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   13005Z-47----SCM

$205.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   13005Z-50----SCM

$205.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   13006Z-47----SCM

$205.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   13006Z-50----SCM

$205.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   130H6Z-50----SCM

$225.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   13806Z-47----SCM

$205.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   13806Z-50----SCM

$205.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   13906Z-47----SCM

$205.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   13906Z-50----SCM

$205.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.

Cellulose Nitrate (CN) Membrane Filter
Cellulose Nitrate (CN) Membrane Filter
Item no.:   139H6Z-47----SCM

$225.00

Microsart® e.motion membrane filters for colony counting, particle testing and microscopy. The membrane filters, specifically designed for use in the Microsart® e.motion dispenser, are individually sterile-sealed in a format packaged on a pleated band, without protective paper. The special pleating of the band of membrane filters ensures that they are perfectly flat when dispensed. The membrane filters can also be used with Sartorius nutrient pad sets.