Mercury Porosimetry Testing Vs. Compression Porometer Testing: How Do the Two Differ?

 

In Mercury Porosimetry testing, the pressure is actually applied to force mercury into tinier and tinier pores. Hence, the pore size distribution can be projected by measuring the applied pressure and the intrusion volume in the test using Mercury Porosimeter.

But what exactly is Mercury porosimeter?

Precisely, it is an automated and versatile engineering instrument used to control various properties. It basically allows mercury porosimetry testing under higher or lower temperatures to put on concrete operational conditions.

On the flip side,

The Automated Compression Porometer is uniquely designed to portray the pore structure of any material under compression. The instrument also permits tests to be carried out under proper virtual service conditions.

Engineering industries globally, varying from the non-woven to the filtration and battery, use the PMI Compression Porometer for quality control and R&D. Samples that are often tested in this marvel machine include membranes filter media, battery separators, and paper.

Process of Mercury Porosimetry Testing

In the most precise way,

Mercury porosimetry testing is a powerful technique used to calculate porosity, pore size distribution, and volume to depict an inclusive range of powder and solid materials.  

The instrument, identified as a porosimeter, essentially enforces a pressurized chamber to force mercury to intervene into the vacuums in a porous substrate. As pressure is put, mercury fills the bigger pores first. As pressure rises, the filling arises to tinier pores.

Both the inter-particle pores between the individual particles and the intra-particle pores within the particle can be characterized using this testing technique.

Process of Compression Porometer Testing

An entirely wetted sample squashed in between two porous and rigid plates is positioned in the sample chamber. As the compressive stress is applied, gas pressure behind the sample starts increasing. Once the pressure is appropriately high, the largest pore gets deflated, and gas starts to flow at an increased rate.

Then, the flow rate and pressure are measured using dry and wet samples. This data is used to analyze the effects of compressive stress on pore size and distribution.

The Compression Porometer consequently embodies compressed material under the state of its actual use.

Salient Features of Mercury Porosimetry Testing Device

·         Completely automatic and user- friendly

·         Windows-based software handles all control, statistics collection, measurement, and report generation

·         manual control

·         Software upgrades for more than 3 years

·         Limitless user-defined data points based on volume, pressure, or a combination

·         Comes with real-time graphical test display with up-to-date configuration

·         Computer equipped program depicts testing status and results during operation

·         Demonstrates both intrusion and extrusion curve

·         A broad range of adequate sample sizes and types

·         Require minimal maintenance

·         Low level of mercury exposure

·         Sample transfers from low pressure to high-pressure stations not required

·         Non-destructive testing

Specifications of Mercury Porosimetry Tester

Pore Diameter Range	0.003 – 350 µm
Pressure Range vacuum	up to 60,000 psi
Pressure Transducers	low, medium, and high ranges
Sample Size	25mm diameter and 25mm long
Examination Ports	2 low- and high-pressure ports
Sample Volume	up to 10 cc or more
Pressurizing Fluid	mercury
Vacuum Pump	two-stage, direct-drive rotary oil pump
Permeability Range	1×10-4 – 5 Darcy
Pressurizing Gas	clean, dry, or compressed air any other non-flammable and non-corrosive gas
Weight	150 kg
Resolution	1 in 60,000
Accuracy	0.15% of reading
Power Requirements	230 VAC, 50Hz
Pressure Range	0 -200 psi

 

Salient Features of Compression Porometer Testing Device

·         Evaluates effects of compressive stress on the largest pore diameter, the mean flow pore diameter, permeability, and pore distribution

·         Fully Automatic

·         Windows-based software for data reduction, acquisition, and storage

·         Compressive stress adjustable by the operator

Specifications of Compression Porometer Tester

Pore Size Range	0.013-500 microns
Permeability Range	microflow 1x 10 1x 10
Sample Size	0.5″ – 2.5″ diameter
Pressure Transducer Range	0 – 500 psi
Resolution	1 in 20,000
Accuracy	0.15% of reading
Pressurizing gas	Dry, clean, and compressed air or non-corrosive gas and non-flammable
Mass Flow Transducer Range	10 cm³/min –
Required Power	110/120 VAC, 50/60Hz
Weight	100 lbs
Dimensions	18.5″ D x 30″ H x 19″ W

 

The Bottom Line,

Mercury porosimetry and Compression Porometer Testing are effective ways to estimate porosity, pore size distribution, and volume to represent an inclusive range of powder and solid materials. 

Mercury Intrusion Porosimeter & Compression Porometer are award-winning instruments used to evaluate the pore size for conducting such testing services. Under actual service conditions, both of these devices make industrial processes less time-consuming.