What Does a Porometer Measure?

What a porometer measures

The obvious answer to the question in the heading is pore size, but this would be a very short article if I left it at that. I’d like to do a quick recap on the variety of measurements and analytical circumstances in which the users of a porometer might be interested. Continue reading What Does a Porometer Measure?

Cartridge Bubble Point Tester

PMI cartridge bubble point tester

Straying just a little from the subject of pore size, but onto a topic that is relevant to many users of porometers and other pore characterisation instruments, my attention has been caught by a new product from PMI. It’s a cartridge bubble point tester… Continue reading Cartridge Bubble Point Tester

Compression Liquid Extrusion Porosimeter

PMI Compression Liquid Extrusion Porosimeter

A very versatile instrument that I’ve been looking at recently is the Compression Liquid Extrusion Porosimeter from PMI. This clever piece of equipment will measure pore volume like a mercury intrusion porosimeter, although without the use of mercury or any other toxic substance, and will also measure liquid permeability like a permeameter. What’s more, it can do so while holding the sample under compressive stress. Continue reading Compression Liquid Extrusion Porosimeter

Cake Forming Porometer


If I say that today I’m going to talk about cake, you might think I’m deviating from the normal subject matter of the Pore Size website. However, cake actually has a vital role to play in the world of filtration, which in turn involves porometry. Not the kind of highly calorific cake that’s so often my downfall but the cake that forms on a filter’s surfaces. Continue reading Cake Forming Porometer

Meritics – Pore Size and More

Meritics logo

This month I would just like to pause and reflect on the important contribution of Meritics (www.meritics.com) to making pore size instruments, advice and support so easily available. This particle and material characterisation specialist supplies and advises upon products from a variety of leading instrument manufacturers, which means it can always be counted upon for an independent view. Continue reading Meritics – Pore Size and More

Porometry Made Simple

PMI porometer

Among the many pore characterisation products currently described on the PMI website is a ‘Simple Porometer’. It reminds me that now might be a good time to go back to basic principles and tell new visitors to Pore Size about what a porometer is and why it is so useful. Continue reading Porometry Made Simple

Liquid-Liquid Porometer

Liquid-liquid porometer - PMI

It’s always good news to me when I see a new porometer on the PMI website! This time it’s a liquid-liquid porometer specially designed for characterising pore size and structure in such materials as membranes, filter media, ceramics, paper and textiles. Continue reading Liquid-Liquid Porometer

Porous Materials, Inc.

PMI bldg

You will probably have noticed that a number of the porometers, permeameters and porosimeters described on this website have been designed and manufactured by PMI – Porous Materials, Inc. This is hardly surprising, as these instruments, which are highly recommended by Meritics, have proved very popular with a wide variety of users. Today I thought I would have a look at the background of PMI. Continue reading Porous Materials, Inc.

Capillary Condensation Flow Porometer

Capillary Condensation Flow Porometer - from PMI

The Capillary Condensation Flow Porometer from PMI is a unique instrument which allows pore size, gas permeability and flow rate to be measured without subjecting samples to the potentially harmful effects of high pressures, extreme temperatures or toxic substances. Continue reading Capillary Condensation Flow Porometer

Fuel Cell Porometer

Fuel cell

Designed for use by manufacturers of fuel cell components, Meritics considers the Fuel Cell Porometer from PMI to be an exceptionally versatile instrument. Its fully automated analysis includes measurement of pore ‘throat’ diameters, the size distribution of the pores, the mean diameter of the flow pores and the surface area – or envelope surface area – of the through pores. It can also be used to determine the material’s liquid and gas permeability. Continue reading Fuel Cell Porometer