Posted in | Pore Size Analyzers

Porometer 3G Series: Accurate Pore-Size Measurement

Porometer 3G instruments from Anton Paar GmbH offer precise and repeatable through-pore size measurements within 30 minutes for any sample. Their general measurement speed and easy operation make these capillary flow porometers the ideal choice for through-pore size distribution measurements of filtration media.

Based on the pore size range and flow-through characteristics of users’ samples, there is a Porometer 3G that fits exactly to the users’ needs.

Porometer 3G micro

  • Quantifies pores of size ranging from 0.07 to 100 μm
  • Utilized with an inlet gas source with up to 100 psi (6.9 bar)

Porometer 3G z

  • Used with inlet gas source(s) with up to 300 psi (20.7 bar)
  • Measures pore from less than 0.03 to 500 μm

Porometer 3G zH

  • Measures pores from less than 0.018 μm to 500 μm
  • Utilized with inlet gas source(s) with up to 500 psi (34.5 bar)
  • Houses sample flow rates of 0.01 to 200 L/minute with standard sample holder

Key Features

No Need for Calibrations: Saving Operator Time and Effort

The pressure sense line present in Porometer 3G instruments quantifies the pressure directly at the sample and is hence unaffected by altering flow rates. On the other hand, traditional capillary flow porometers quantify the pressure at a certain fixed point before employing the sample and make use of sample-specific flow path calibrations to estimate the pressure at the sample.

Since the amount of airflow inside this path impacts the pressure gradient that exists, every sample type needs calibration to be executed and applied. The Porometer 3G’s special design avoids the need for calibrations. This implies that much less effort is required and eventually more precise measurements are ensured.

Porometer 3G Series: Accurate Pore-Size Measurement

Image Credit: Anton Paar GmbH

Automatic Pressure Regulation Ensures Ideal Measurement Conditions Every Time

Porometer 3G instruments make use of an intelligent pressurization routine specially developed to guarantee outcomes in equilibrium through the entire measurement.

This routine avoids the issues associated with traditional systems because measurements made with a constant ramp rate, which is highly rapid, offer smaller-than-correct pore sizes, as they do not give sufficient time for equilibrium to be obtained at each pressure data point.

On the contrary, similar measurements performed very slowly accentuate the effects of wetting fluid evaporation, thereby offering larger-than-correct pore sizes. Porometer 3G units control the pressure automatically leading to precise outcomes independent of the settings.

Porometer 3G Series: Accurate Pore-Size Measurement

Image Credit: Anton Paar GmbH

Complete Through-Pore Size Distribution for the Full Set of Data

Porometer 3G performs all flow measurements on a single flow meter, and thus achieves a constant account of through-pores present in users’ material. This includes the critical region between the optimum and mean pore sizes.

Capillary flow porometers in which measurement devices are switched once the bubble point is achieved face the risk of missing a portion of this data. Users can depend on Porometer 3G to provide an entire data set.

Porometer 3G Series: Accurate Pore-Size Measurement

Image Credit: Anton Paar GmbH

Wet-then-Dry, Dry-then-Wet — Choice for Users

Capillary flow porometry measurements include both a “wet curve” (the flow leading to the expulsion of wetting fluid from pores at various pressures) and a “dry curve” (the flow via the material over the pressure range of the measurement when wetting fluid is present).

Quantifying wet-then-dry is very easy for the operator and does not involve opening the sample holder in between during the experiment.

Dry-then-wet measurements eliminate worries regarding possible impacts on the sample while making the wet curve. Both measurements are included on all Porometer 3G instruments. Users can enjoy the workflow comfort of wet-then-dry measurements and still have the option to carry out dry-then-wet measurements when samples demand it.

Porometer 3G Series: Accurate Pore-Size Measurement

Image Credit: Anton Paar GmbH

Adapts to the Wide Range of Sample Requirements in Users’ Lab

All Porometer 3G instruments exhibit the potential to utilize different shape factors and various fluids to develop a test method catered particularly according to sample measurement requirements of the users. Their design is ideal for adjusting the samples of various sizes and shapes through external holders for use with hollow fiber, rigid tubular or solid piece configurations.

Porometer 3G Series: Accurate Pore-Size Measurement

Image Credit: Anton Paar GmbH

Technical Specifications

Source: Anton Paar GmbH

  3G micro 3G z 3G zH
Pore size, minimum 0.07 µm <0.03 µm <0.02 µm
Pore size, maximum 100 µm 500 µm 500 µm
Pressure controllers 1 2 2
Controller #1 0 psi to 100 psi 0 psi to 30 psi 0 psi to 30 psi
Controller #2 n/a 0 psi to 300 psi 0 psi to 500 psi
Pressure sensors 2 3 3
Sensor #1 0 psi to 5 psi
Sensor #2 0 psi to 100 psi
Flow sensors 1 1 2
Sensor #1 0 L/min to 100
0 L/min to 100
L/min (standard)
0 L/min to 10
Sensor #2 n/a n/a 0 L/min to 200 L/min
Flow sensor switching n/a manual auto
Pressure sensing accuracy ±0.05% f.s.
Pressure resolution 16 bit A/D equivalent
Flow sensor type Precision thermal mass flow
Flow sensor settling time <2 seconds
Flow sensor temperature
<0.05%/°C (15 °C to 45 °C)
  General specifications
Electrical properties 90 V to 240 V AC, 50/60 Hz
Main control unit
dimensions (H x D x W)
40 cm x 45 cm x 19 cm (15.8 in x 17.8 in x 19 in)
Sample holder block
dimensions (H x D x W)
24 cm x 32 cm x 15 cm (9.5 in x 12.6 in x 6 in)
This table shows standard configurations. Different pressure and flow rate ranges are available for some models.

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