Air Permeability Tester Vs. Helium Porosimeter: What's The Difference?

Air Permeability Tester and Helium Porosimeter are machines that have hastened industrial processes making them cost-effective and less time-consuming. However, when you're faced with choosing one of these machines for your particular industry, you need to know a few things. 

First, how do both of these differ, and second, which of these is suited for your industry? So, without further ado, let's discuss the key differences among both of these machines.

Helium Porosimeter vs. Air Permeability Tester

  • Helium Porosimeter

The Advanced Helium Porosimeter measures the true density and volume of the given samples, including ash coal, char, and many other particles. The test is used to determine the powder bulk of solids, including calcinated petroleum coke. 

The true volume of a solid is calculated from the pressure drop when an estimated gas containing the sample can expand into the chamber. Hence, the true volume obtained after the porosimetry excludes the pore volume accessible to the gas.

The device calculates from the measured drop in pressure when gas is allowed to expand into its chamber. Thus, the true volume is obtained by porosimetry and excluded from the pore volume accessible to the gas. 

Helium is the most preferred gas because it exhibits an ideal behavior for the measurements of the true volume and density of solid powders. Furthermore, the machine is fully mechanized and provides high-speed, precise volumetric measurements and density calculations.

However, to use this machine, the room temperature should be ambient, similar to laboratory conditions. Precisely, temperatures of 5-50 degree Celsius and relative dusty humidity of 100% is required.

Sample treatment for the Helium Porosimeter is conditioned to remove any trapped air and contaminant options to purge suitable methods. The device can also be operated through a PC and manually by the given panel buttons.

  • Air Permeability Tester

This machine determines the resistances of fabrics that include knitted, nonwoven, woven textile material to airflow passage. Consistent air pressure is applied to the sample while it is firmly clamped in the selected test area's test rig. The sample is then loaded to the test area of the machine easily through the means of a pneumatic holder.

The test starts when the holder is pressed down. The pre-selected test pressure is automatically maintained. The air permeability tester with the vacuum pump draws air through an interchangeable testing head with a circular opening

After a few seconds of air permeability, the sample results are digitally displayed in the pre-selected measurement units on the included LCD screen. Lastly, the test holders are released, and the vacuum pump is turned off.

The power consumption requirements are 220/110 V with 50/60hz and 2 KW. The various power options make this machine suitable for a variety of industrial tasks.

The air permeability tester considers a testing area of 5,20,50 and 100 cm^2. The air permeability tester weighs 80 kg, and its dimensions are 1250 x 700 x 1250 mm (L x W x H). This thickens the air permeating rate at a differential pressure of 1~40000 mm per second. Lastly, the pressure range is 1~4000 pa with a maximum sample thickness of 8mm.

How do the two differ?

The first differences are the functionalities of both the machines. The Helium Porosimeter measures the true density and volume of samples like ash, coal, and char particles.

On the other hand,

The Air Permeability Tester determines the resistance of fabrics to airflow. This kind of machine is best suited for textile industries as it can test knitted, nonwoven, and woven surfaces.

Conclusion,

Both of the machines mentioned above have proven their usefulness in achieving results. Without them, testing processes wouldn't have been as easy as they are now. Consider these machines according to your industrial requirements, and pray to tell,

Location: 20 Dutch Mill Rd, Ithaca, NY 14850, USA

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