Service och kvalitet för ditt lab 

Some cookies are necessary for this site to work properly and will be stored temporarily on your computer and disappear when you close your browser. Cookies are also used so that you will have a better experience as a visitor to this website. Not allowing cookies may prevent you from using certain parts of this website.

Therefore we would like to place cookies on your device in order for this website to function in the way that we intended.

AccuPyc II 1340 Pycnometer

operation-graphic web375x160Gas Displacement Pycnometry System

Gas pycnometry is recognized as one of the most reliable techniques for obtaining true, absolute, skeletal, and apparent volume and density. This technique is non-destructive as it uses the gas displacement method to measure volume. Inert gases, such as helium or nitrogen, are used as the displacement medium. Density calculations using the gas displacement method are much more accurate and reproducible than the traditional Archimedes water displacement method.

The AccuPyc II 1340 Series Pycnometers are fast, fully automatic pycnometers that provide high-speed, high-precision volume measurements and true density calculations on a wide variety of powders, solids, and slurries. The instrument completes most sample analyses in less than three minutes without sacrificing accuracy. After analyses are started with a few keystrokes, data are collected, calculations are performed, and results displayed. A minimal amount of operator intervention is required.

Principle of Operation

This technique uses the gas displacement method to measure volume accurately. Inert gases, such as helium or nitrogen, are used as the displacement medium. The sample is sealed in the instrument compartment of known volume,the appropriate inert gas is admitted, and then expanded into another precision internal volume. The pressures observed upon filling the sample chamber and then discharging it into a second empty chamber allow computation of the sample solid phase volume. Helium molecules rapidly fill pores as small as one angstrom in diameter; only the solid phase of the sample displaces the gas. Dividing this volume into the sample weight gives the gas displacement density.

 Read More in this Brochure



Chemical Instruments AB (CiAB)
Grevgatan 13 4tr
114 53 Stockholm


Phone +46 8 544 81 260
Fax +46 8 7675302

Payment information 556370-0912
VAT-no: SE556370091201
Bankgiro account: 5640-0666
Bank: Swedbank