Gas Pycnometer

The Innova PYC-IA and Innova PYC-IIA Gas Pycnometers are instruments designed to determine the true volume and density of powders and bulk solids through the gas replacement method. These devices use high-precision detectors for volume measurement and density with porosity calculations to provide accurate results. True density refers to the mass per unit volume of a solid in an absolutely dense state after removing the internal pores or inter-particle voids. The Innova PYC-IA and Innova PYC-IIA Gas Pycnometers comply with ASTM B923, C604, D2638, D550, and other relevant standards.

Features

The Gas replacement method is utilized for the determination of true density, based on the Archimedes principle and gas expansion displacement method. In this method, a small inert gas such as helium or nitrogen is used under controlled conditions of the Law of Bohr (PV=nRT). The decrease in gas volume caused by the test sample in the test chamber is measured to calculate the true volume and analyze the true density.

To carry out the test, the displacement gas is pressurized to a target pressure and introduced into a reference volume chamber with a known volume. The pressure is then recorded after stabilization. The valve is opened to allow the gas to expand into the sample chamber, also with a known volume, and the second pressure is recorded after stabilization. The pressure drop ratio is compared to the behavior of the system when a known volume standard undergoes the same process.

Specifications