From R&D to QC applications, the​ Versa-Pyc XR
is a gas pycnometer of choice for wide ranges of samples volume measurements. Two built-in reference chambers, (nominal 10 cc and 100 cc), cover the most common range of volumes from fraction of mL to over 100 mL. The range can be easily extended to at least 1000 mL by using auxiliary hardware and attaching either optional chambers or user-designed chambers.  

The Versa-Pyc XR utilizes gas expansion technique and is optimized for accuracy and speed. Both, Automatic and Manual modes, are implemented in software. The unique design of software allows the user for defining and carrying out experiments and all data are recorded in text format. 

Versa-Pyc XR™ Pycnometer with extended range of volume

Versa-Pyc XR Accessories

Versa-PycXR accessories

 Large sample holder and sample chamber closing cover with inner bore for large reference chamber; thick wall sample holder with flat bottom and a tool for forming flat bed of powder (optional); volume reducing adapter, small sample holder, and sample chamber closing adapter with flat bottom.

Calibration Kit with Micro Kit

VersaPyc XR™ – Versatile gas (He) Pycnometer, 1-100 + cc, Lab & Field Description, features, and specifications     (pdf)

Main Features and Specifications:

• Fully automated and controlled via PC software (any 32 or 64 bits Windows based OS)
• High accuracy: < 0.02% and resolution: < 0.0001 cc
• High accuracy (0.08% accuracy) absolute pressure transducer (0 - 50 psia, 0 - 344 kPa)
• Volume range: from fraction of mL to over 100 mL (basic) to over 1000 cc (optional)
• Hermetically closed sample holders with metal filters (No elutriation)
• Extensive calibration kit
• Built-in precision pressure regulator and vacuum pump 24-bit data acquisition
• Powered by regulated 12 VDC power supply (requires 6-12 W)
• Lab / Field applications
• Can measure volume using vacuum mode (ambient air and vacuum pump)
• Designed for high performance and low budgets (< 7 k$) as a basic set w/ accessories
• Simple and easy installation by the user (instructions provided

Examples of custom designed hardware for additional applications

VersaPyc with external chamber

​Special sample chamber volume reducing adapter, added external reference and sample chamber with volume reducing inserts form one of many possible custom solutions for measuring volume (density) of larger foam samples or specific size finished products.  

Auxiliary hardware for larger samples

Versatile sample chamber components for larger cuboidal or circular foam samples or finished products
The design allows using full or half of the volume by reversing the upper half of the chamber. Maximum cuboid shape dimension: 51 x 51 x 51 mm or 51 x 51 x 25 mm.
Maximum circular shape dimensions: 75 mm dia. x 64 mm height, or 75 mm dia. x 32 mm height.  

The photo above illustrates one possible extension of volume range by using sample chamber adapter and two separate stations.
​The volume of the station attached to the externally available reference chamber port (EXT REF) can be filled with any suitable object (e.g. metal/glass object) to adjust its volume.  Volume of such resulting reference chamber can be calibrated using the sample station and suitable object of known volume, e.g. precisely machined metal rod. Carrying out experiment is the same as in regular pycnometer, except that the sample chamber is external to the instrument. Our novel design allows using the container as a sample holder. 

Rock core holding hardware added to VersaPyc XR pycnometer sample chamber

​Measurements of air permeability of sandstones using a pycnometer, novel experimental and theoretical approach.  (pdf)

Addition of auxiliary hardware to a gas pycnometer forms a permeameter- pycnometer instrument which allows for air permeability measurements as well as density and porosity. Characterization of sandstone samples using the linear (Darcy) model and capillary flow model (corrected Poiseuille equation)  is presented. 

​This option can be added to other pycnometers and  in pV/T Master it can be implemented in automatic mode. 

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To inquire about our products, please contact us at:  [email protected]     ​

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INSTRUQUEST INC.  SCIENTIFIC INSTRUMENTS R&D