Capillary Flow Porometry (CFP) — also known as Gas Liquid Porometry (GLP) — is a fast, reliable method to determine the size and relative abundance of throughpores in sheets and membranes. This pressure-based technique measures the minimum diameter of a pore, averaging over a significant test area, without the need for model-fitting or image processing. Measurements are fast, sample preparation takes less than 30 seconds, and no mercury is involved.
The lowest pressure at which flow occurs.
Intersection of the wet curve with the dry curve divided by two — the half-dry curve.
Intersection of the wet curve with the dry curve.
A continuous distribution of the differential and cumulative pore size reveals the overall structure of pores in a membrane.
The SmartFlow system provides precision control for porosimetry in either pressure ramp or step modes. The option to perform measurements in either mode ensures the correct measurement is available from routine qualification to detailed characterization.
Increasing pressure at a steady rate shortens measurement time, provides a highly repeatable measurement, and produces data points tightly spaced in pressure.
Routine operation, producing high resolution, highly repeatable data, in a short time.
Pausing at each pressure for equilibration allows all pores of a given diameter to fully empty before moving to the next pressure, regardless of pore length or tortuosity.
Highest possible resolution and absolute pore size accuracy especially for complex pores and thick sheets
High resolution, low noise pressure-flow curves enable highly detailed pore size distributions that reflect physical pore architecture WITHOUT curve fitting or post-processing.
The AccuPore features SmartFlow, an advanced flow control system that guarantees the most precise pressure control, highest sensitivity, and lowest signal noise. High-resolution 24-bit electronics operated at 20 Hz for optimal signal quality and system response. With eight complementary transducers and controllers, SmartFlow delivers the most responsive and stable performance, even during rapidly changing conditions such as pore opening.
Flexible easy-to-use
sample chamber
Intuitive Breeze Interface
Convenient USB
High-speed control, collection, and data processing
MIC Net
Auto-switching gas supply
SmartFlow also enables direct measurement of true bubble point through a proprietary flowcontrolled method that provides unmatched accuracy and repeatability. Conventional estimates of bubble point from pressure ramps lack sensitivity and can underestimate the largest pore diameter. SmartFlow ensures precise bubble point measurements, typically much better than ±1%.
| First Bubble Point Size (µm) | ||||
|---|---|---|---|---|
| Measurement | Track-etched membrane A |
Track-etched membrane B |
Track-etched membrane C |
Track-etched membrane D |
| 1 | 1.153 | 0.309 | 0.092 | 0.055 |
| 2 | 1.151 | 0.309 | 0.092 | 0.055 |
| 3 | 1.170 | 0.308 | 0.092 | 0.054 |
| 4 | 1.164 | 0.309 | 0.091 | 0.054 |
| 5 | 1.162 | 0.308 | 0.092 | 0.054 |
| 6 | 1.180 | 0.309 | 0.091 | 0.054 |
| 7 | 1.166 | 0.309 | 0.091 | 0.054 |
| 8 | 1.178 | 0.310 | 0.091 | 0.054 |
| 9 | 1.175 | 0.308 | 0.090 | 0.054 |
| 10 | 1.165 | 0.309 | 0.090 | 0.054 |
| Average | 1.166 | 0.309 | 0.091 | 0.054 |
| Relative standard deviation | 0.83% | 0.22% | 0.72% | 0.54% |
The intuitive Breeze touch interface gives you everything you need at your fingertips. Perform a measurement, review past results, send a report to print or to LIMS (PDF, text, or Excel) with the touch of a finger. Save space in your lab by eliminating a PC from the bench.
Prefer to work from a PC nearby or in your office? You can do that too! Execute measurements, view status of multiple instruments, or review results…anywhere.
MicroActive software streamlines data processing, offering detailed plotting, analysis and reporting, including statistical process control charts and results overlays. Gas-liquid CFP is a direct complement to mercury intrusion porosimetry (MIP), providing a rich description of pore architecture. Only with MicroActive can you easily co-plot results from the AccuPore CFP and AutoPore MIP to fully describe the pore characteristics of a material.
The flexible design of the AccuPore CFP makes it simple to move between sample diameters: 13 mm, 25, mm, 47 mm all within the same sample chamber. A selection of sample supports provide reliable measurements to the highest pressures, even for thin or weak membranes while also reducing gas consumption by up to 95%.
Micromeritics wetting fluids meet the analytical challenges of new material characterization and support the requirements of legacy methods. Galwik is often preferred for its low surface energy and vapor pressure: filling pores completely and resisting evaporation during analysis. Porewik is also available for legacy method compatibility and specific demanding applications.
Install and operate the AccuPore with confidence, knowing it has been designed and tested to the highest standards for EMC compliance and operator safety.
Vented pressure cap seal
Real time pressure indicator
CB-scheme
UL/CSA 61010-1, -2-081
Never hunt for a past result or worry that your method settings are out of date. MIC Net is an instrument-to-instrument network that shares and stores results and methods across devices.
Often characterized by a broad distribution of pore sizes due to their...
| Technique | Capillary Flow Porometry |
| Measurement Method | Pressure Ramp |
| Pore Size Range | 0.013 µm to 500 µm* |
| Max Pressure | 500 psi / 35 bar |
| Max Flow Rate | 200 L/min |
| Analysis Gas Supply | Air or N2 |
| Operational Modes | Bubble Point (Direct Measure) |
| Physical Dimensions | 57 cm Wide x 61 cm Deep |
| Curve Resolution | >1000 data points per run |
| Sample Sizes | 25 mm diameter standard |
Provided specifications were valid as taken from available documents at time of publication. These specifications may change without notice and are only provided as a general reference
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