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PSM 165 Pore Size Meter

PSM 165 Pore Size Meter for analysis of pore size distributions of woven, non-woven fabrics and open-pore samples

*** Topor will be discontinued on 31.12.2025. If you have any questions, please contact our sales team (stopspam_1560befd2bbbd575959d8b51c3056f1b). ***

The unique PSM 165 Pore Size Meter provides pore size information for a wide range of porous materials with applications in the field of filtration, hygiene and tissue engineering.
Capillary Flow Pore Size Meter PSM 165 frontsideCapillary Flow Pore Size Meter PSM 165 with adapter
Capillary Flow Pore Size Meter PSM 165 frontsideCapillary Flow Pore Size Meter PSM 165 with adapter
Materials that may be tested include filter papers, micro sieves, non-woven as well as woven materials and sintered polymers or metals. The operator of the pore size analyser is guided through the test procedure by an easy to use PSMWin software package running on a standard PC.


ASTM F316-03
ISO 4003
ISO 2942
ASTM D6767-11
DIN 66140
EN 868-2
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  • high accuracy especially for pores > 10 µm, particularly relevant for non-woven fabrics and open-pore samples
  • open concept for sample holder, manual bubble point measurement is possible, which is necessary for particularly dense samples
  • customised sample holder adapted for the measurement of various test specimens


  • barrier effect and germ retention of textiles - multifilament woven
  • hygiene - capillary effect and suction power of absorbers of sanitary products
  • injection printing - capillary effect and typeface of print-out paper
  • cell cultivation - specific inner surface of carrier materials
  • filter materials - pressure loss characteristics and fractional efficiency
  • quality vontrol and incoming goods inspection

The basic principle of pore size measurements is that liquid filled pores will become gas permeable at a certain gas flow pressure. This initial differential pressure indicates the bubble point of a material.

As real materials contain a range of pore sizes, the bubble point corresponds to the opening pressure of the largest pore. The measured pressure value is dependent on the surface tension of the test fluid used.

By further increasing the gas flow rate, and therefore the pressure drop across the material under test, it is possible to calculate a pore size distribution from these two measured parameters.

The applied measuring principle is in close accordance with ASTM E 1294-89 and ASTM F 316-03 standards. In addition to test liquid Topor, measurements can be carried out with a range of other test liquids. To achieve reliable results the surface tension of the test fluid must be known and a sufficient wetting of the test sample has to be guaranteed.

Parameter titleUnitValue
measurand(s) - pore size distribution, gas permeability
measuring range, pore size µm 0,25 ... 130
operating medium, gas/air - compressed air supply bar max. 6
Betriebsmedium, test liquid - Topor
power supply V AC 110 ... 230
weight kg 12
dimensions (w × h × d) mm 480 x 390 x 310
  • triple-staged compressed air cleaning assembly
  • Topor - test liquid for pore size measurements with pore size analyzer
  • Fan Q., Liang W., Fan T.-T., Li X., Yan S.-Y., Yu M., Ning X. and Long Y.-Z Polyvinylidene fluoride composite nanofibrous filter for high-efficiency PM2.5 capture Composites Communications 22 (2020) 100533,
  • Liu Y., Qian X., Wang L., Qian Y., Bai H. and Wang X. Hierarchical micro/nanofibrous filter for effective fine-particle capture Powder Technology 360 (2020) 0, 1192 - 1199
  • Liu Y., Qian X., Zhang H., Wang L., Zou C. and Cui Y. Preparing micro/nano-fibrous filters for effective PM 2.5 under low filtration resistance Chem. Eng. Sci. 217 (2020) 115523,
  • Yang Y., He R., Cheng Y. and Wang N. Multilayer-structured fibrous membrane with directionalmoisture transportability and thermal radiation forhigh-performance airfiltration e-Polymers 20 (2020) 1, 282 - 291
  • Zhu F., Su J., Wang M., Hussain M., Yu B. and Han J. Study on dual-monomer melt-grafted poly(lactic acid) compatibilized poly(lactic acid)/polyamide 11 blends and toughened melt-blown nonwovens Journal of Industrial Textiles 49 (2020) 6, 748 - 772
  • Ullmann C., Babick F. and Stintz M. Microfiltration of Submicron-Sized and Nano-Sized Suspensions for Particle Size Determination by Dynamic Light Scattering Nanomaterials 9 (2019) 6,
  • Li X., Wang X.-X., Yue T.-T., Xu Y., Zhao M.-L., Yu M., Ramakrishna S. and Long Y.-Z. Waterproof-breathable PTFE nano- and Microfiber Membrane as High Efficiency PM2.5 Filter Polymers 11 (2019) 4,
  • Zhu F., Su J., Zhao Y., Hussain M., Yasin S., Yu B. and Han J. Influence of halloysite nanotubes on poly(lactic acid) melt-blown nonwovens compatibilized by dual-monomer melt-grafted poly(lactic acid) Text. Res. J. 89 (2019) 0, 4173 - 4185

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