Welcome To Our Pore Size Blog

pore size porometer instrumentHello and welcome to Pore Size, a site specially set up by Meritics to bring you the latest information and insight on all issues relating to characterisation of porous structures – particularly in terms of pore size.

The site is brought to you as part of our continuing effort to provide independent advice that will ensure the right choice of technique and product to meet each specific particle and material characterisation need.

Here you will find explanations and descriptions of the techniques and instrumentation available, together with news, background information and – above all – good advice. With our help, you will gain a clear understanding of the many porometry or porosimetry products available on the market and identify the perfect solution.

For many applications, porometry is based on the principle of measuring the flow rate of an inert gas, passed through a dry sample of the material, with increasing differential pressure. The sample is then brought into contact with a wetting liquid, which spontaneously fills the pores, and its flow through the wet sample is measured with increasing differential pressure. A formula is used to compute pore structure characteristics from the differential pressures and flow rates measured.

The variety of porometers can be quite bewildering, but each has its own advantages and applications which we will help you to explore.

We will also look at the related topic of permeameters. These instruments measure the ability of a porous material to allow the flow of liquid. This flow rate – or permeability – is calculated by measuring the pressure drop across the sample, the thickness of the sample and the viscosity of the fluid, then applying a formula.

Among other techniques covered by this site will be mercury porosimetry. In this method, the sample of material is immersed in mercury and pressure is applied to force that liquid into its pores. The pressure required to achieve this is in inverse proportion to the size of the pores. This is a very quick and easy way to analyse pore characteristics but it is not applicable to every situation. Meritics will explain where it should and should not be used.

Because Meritics represents a whole range of leading instrumentation manufacturers, we have no vested interest in pushing you towards any particular product. You can trust our advice to be impartial as well as expert.

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