To reduce errors in determination of physical  volume measurements of a
foam sample, additional hardware for cutting exact shapes can be provided.
HumiPyc Model 2F (Foam)  Pycnometer -
Complete solution for measurements of foams volume (density)
Software compatible with 64-bit Windows®
operating systems
Volumr Reducing Square Adapter
Foam Cutting Table
Foam Cutting Table  available
as optional  equipment
Volume cube adapter
The adjustable foam-cutting table was designed for cutting various rectangular shapes using a thin blade knife.
Geometrical  dimensions can be easily measured using a high quality digital caliper.
(Precise cylindrical shapes, especially from foam sheets can be cut using special  hole saws with knife-edge. To obtain
best results, the user may employ additional  equipment (like drill press) and ensure all the safety measures).
The first volume measurement of the whole foam sample using a gas pycnometer yields the uncorrected volume which  is only accurate for
predominantly open-cell structures. To obtain correction for closed cells that were cut during the foam sample preparation, the original
specimen is cut into pieces to expose additional closed cells (proportional to surface area) and the foam pieces are measured again.  
From the geometric volume, and the first and second pycnometric runs, parameters like porosity, percentages of closed and opened cells
can be calculated. The foam calculator available in newer software versions facilitates these easy calculations.

The gas pycnometer also allows foam volume (density) measurements at programmable pressure levels and the results can serve for
further characterization of foams (e.g. compressibility, recovery from compression).  
For flat foam samples primarily designed for filtering, bubble point pressure (largest pore(s)) can be determined using additional hardware.
Design features:
  • Fully automated operation via PC
  • Novel software approach  for experiment design and convenience of operation
  • Ability to set low pressures to avoid foam distortion and carry out accurate measurements using 24-bit resolution
  • True gas purge using a separate exhaust (similar design as in the cement density and fineness
       (specific surface area determination technique ( Permeametry)
  • The foam sample can be purged to specific relative humidity value using optional RH probe.
  • Specific (optional) hardware for other analytical capabilities
Measurement of true density, porosity, percentages of open-cell / closed-cell  of foams plays important role in development and quality
control of various properties of the cellular materials. Characterization of foams presents its own challenges and the highest
performance gas pycnometers and dedicated accessories need to be used. The enhanced and optimized HumiPyc Gas (Helium)
Pycnometers with dedicated hardware are superior tools for foams characterizations.
Standard test methods for foam open cell content, like ASTM D6226 or ISO 4590 stipulate specific shapes and sizes of
foam samples.
To optimize the foam volume determinations results,  volume reducing adapters accepting cubes or cylindrical shapes
can be provided.
InstruQuest Inc. Scientific Instruments R&D
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