PV-Pyc 200™ Symmetrical concept of true volume (density) measurements

The unique design of dual technique PV-Pyc 200™ pycnometer ​can be  used as a gas (Helium) pycnometer utilizing gas expansion method or as a true vacuum pycnometer when only ambient air is involved but no mercury or glassware is used as in a classical air pycnometer. The introduced symmetrical concept of true density measurements by using pressurized and vacuum conditions relative to atmospheric pressure can provide additional characterization of solid and semi-solid samples. The pycnometer is optimized for speed and larger size samples, up to 200 cc. It is fully automated and controlled via PC software and any computer with Windows OS can be used. The pycnometer is powered by any regulated 12 V DC source (6-12 Watts needed) and can be used in lab or field applications. 

PV-Pyc 200™ - Pressure, Vacuum Pycnometer, 200 cc, Lab & Field   Pdf file​

​Density and Porosity Kit for Packed Beds    Pdf file

PV-Pyc 200™ Density and Porosity Kit for Packed Beds

PV-Pyc 200™ Calibration Ball and Handling Tool

Main Features and Specifications:
-High accuracy: < +-0.05 % and resolution: < 0.0001 cc
-Large sample chamber: 65 mm diameter x 76 mm height
-High accuracy absolute pressure transducer (0.08 %, 0.05 % or 0.03 % optional)
-Large range of volumes, from over 200 to 1 cc
-Non-elutriating sample holders for fine powders
-Porosity and density kit (optional)
-Convenience kit (disposable liners with forming tool)  for hard to clean samples (optional)
-Built-in precision pressure regulator and vacuum pump 24-bit data acquisition
-Powered by any regulated 12 V DC (requires 6-12 W)
-Can operate as regular gas expansion or air (vacuum) pycnometer
-Fully automated and controlled via provided PC software (any 32 or 64 bits Windows based OS)
-Optimized for speed (QC and R&D)
-True density and porosity by pressure and by vacuum

Gas (Helium) Pycnometer Theory and Practice  
Basic theory of gas expansion pycnometer operation, general description of pycnometer applications and practical hints.  ​

Converting PV-Pyc 200™ to Surface Area Analyzer

PV-Pyc 200™ with optional cell design

​PV-Pyc 200™  Optional accessories ​
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VERSATILE CELL DESIGN FOR FLOW RATES MEASUREMENTS THROUGH PACKED BEDS.                                                                                           
                  

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     Advances in Permeametry
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​Development of improved comparative and absolute methods for determination of specific surface area of porous powders (cementitous materials) using gas (air) permeability technique.​

​Proposal of quadratic equation for prediction of flow rates versus pressure in packed beds of cement.  Pdf.file       ​
​Based on experimental measurements of flow rates versus pressure in packed beds of cement, the quadratic relationship is obtained and discussed. The coefficient at quadratic term is proposed as the basic parameter for characterization and extraction of other parameters of interest. Advantages of the equipment over Blaine apparatus used in ASTM C 204 method are presented.

Importance of output pressure value in measurements of gas flow rates versus pressure input in packed beds of powders. 
​  This brief communication explains relevance of monitoring at the packed bed output and a need of using more than just one transducer....                                                                                                                                                                             ​

Specific surface area of powders

Absolute method for determination of the specific surface area using gas (air) permeability technique.                                                                                             
 
​ New equation was derived for obtaining specific surface area from experimental  data of gas flow through packed beds of porous materials...
                                                                                                                                                                                                                                                             
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To inquire about our products, please contact us at:  info@instruquest.com     

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INSTRUQUEST INC.  SCIENTIFIC INSTRUMENTS R&D