Engineering and technology have revolutionized how industrial processes were conducted. Speaking of technology, two machines, the Mercury Intrusion Porosimeter and the Liquid Extrusion Porosimeter have gained popularity as they have made intricate procedures less costly and time-efficient.

Yet, you need to know which of these machines is fit for your industrial use. Today, let's compare these machines so that you can determine the differences and understand their relevance to your industry. So, without further ado, let's start comparing these.

The Liquid Extrusion Porosimeter against the Mercury Intrusion Porosimeter

• Liquid Extrusion Porosimeter

The Liquid Extrusion Porosimeter is a mechanical device that measures the volumetric distributions of through-pore volumes and liquid permeability. This doesn't use mercury as a wetting fluid, so it can characterize porous materials based on their nature. These porous materials range from biotech, filtration, food, and environment. The Liquid Extrusion process is hazard-free for both the environment and the operating personnel.

Test that is performed initialize once the sample is placed in the chamber and the largest membrane pores are made smaller than the smallest pores. Sample pores are then filled with the non-mercury wetting liquid, and the pressure of non-reacting gas is increased to push the liquid out of the pores.

Based on the equation:

p = 4 y cos 0 / D

The differential pressure (p) displaces the liquid from the pore diameter (D) and creates a surface tension for the liquid (y). The contact angle of the liquid (0) is then derived.

The displaced liquid passes through the membranes' filled pores, yielding the measurement of liquid permeability. During this process, the filled pores don't allow the gas to pass through because of liquid interference and insufficient pressure.

The gas pressure creates a pore diameter in which the liquid volume is displaced. Measurements of the liquid flow rare without any membrane under the sample are measured, giving the sample's liquid porosity.

• Mercury Intrusion Porosimeter

Mercury is another commonly used liquid in porosity tests. The device that uses this most effectively is called the Mercury Poosimeter. The test it runs is based on the physical principle that a non-wetting and non-reactive liquid can only penetrate the finest pores. It's possible when enough pressure is allowed for the gas to intrude through predetermined pore diameters according to the Washburn Equation:

D = - 4 y (cos0) / P

In this equation, (P) is the applied pressure, (D) is the pore diameter, (0) is the contact angle, and (y) is the surface tension. The equations measure the intruding mercury's volume as the sample's pressure function increases and permit pore size and volumetric distribution. The test's capability ranges from 0.2 to 60,000 psi values to 3.6 nanometers and 1100 microns.

How do the tests differ?

Liquid Extrusion Porosimeter measures volume distribution of the through-pores, their volume, and liquid permeability. On the other hand, Mercury Intrusion Porosimeter uses mercury to find out the pressure required to force the liquid mercury into pore diameters.

What else? These vary in principle as the Liquid Extrusion Porisimeter measures by the equation of pressure and Mercury Porosimeter measures using the equation of diameter. Yet, which one should you choose?

Conclusion,

The machine that you should choose is the one that best fits your industrial requirements. These devices are designed to conduct advanced porosity tests, research, development, and quality assurance tasks. Yet,