G-DenPyc 2900 Gas (Helium) Pycnometer Theory and Practice

G-DenPyc 2900 helium pycnometer density analyzer working principle

A gas pycnometer operates by detecting the pressure change resulting from displacement of gas by a solid object. Expanding a quantity of gas at known pressure into an empty chamber and measuring the pressure establishes a baseline. Then a sample is placed in the chamber and the chamber is resealed. The same quantity of gas at the same pressure is again expanded into the sample chamber, and the pressure is measured. The difference in the two pressure combined with the known volume of the empty sample chamber allows the volume of the sample to be determined by way of the gas law.

The accuracy and precision of the gas pycnometer in determining density is good, but the method relies greatly on the cleanliness of the sample material and purity of the analysis gas. In this case, Gold APP Instruments had explored a smart sample preparation degasser for materials handle, can guarantee to gain the "cleanliness" testing data.

G-DenPyc 2900 helium pycnometer density analyzer application

Apply to research and quality control for below materials: ceramic, catalysts, filter medium, nuclear fuel, oil & chemical industry, soil, fertilizer, carbon black, hard coke, fiber, minerals, pharmacy, cosmetics, cement, powdered foodstuff, desiccant (drying agent), powdered metal, ion exchange resin, silicon gel, alumina, titanium dioxide, solid foam etc. true density data, also can be used to measure open and closed pore cell for rigid foam materails.

G-DenPyc 2900 helium pycnometer density analyzer specification

1.       Analysis Principle: Volume displacement method/gas expansion principle

2.       Testing Data: true (also terms as real, absolute, apparent or skeletal) density analysis, rigid foam materials percentage of open/closed pore space analysis

3.       Analysis Pressure: external vacuum pump is option, can adopt negative pressure (0-1Bar) or positive pressure (1-2Bar) two modes to analysis

4.       Data Accuracy: accuracy ±0.02%, repeatability ±0.01%, resolution 0.0001 g/cc

5.       Sample Station: three analysis stations

6.       Sample Chamber: provide standard 10ml, 15ml and 65ml chambers, also can customize any volume chambers from 5-180ml.

7.       Pressure Accuracy: imported high-precision pressure transducer, accuracy can reach 0.05% F.S., stability 0.025% F.S.

8.       Adsorbate Gas: high purity Helium or air or Nitrogen

9.       Operation: a built-in PC with a 10 inch touchable display, can do all testing steps from this PC, also supports to monitor the whole procedures

G-DenPyc 2900 helium pycnometer density analyzer features

1.       Data Reduction: high-precision PpT gas density calculation model eliminates measurement errors caused by non-ideality gas state, can increase analysis accuracy

2.       Control System: programmable logic controller (PLC) system obtains high integration and strong anti-interference, software operated fully automated analysis enables freely choose of multi measurement modes

3.       Analysis Management: programmable built-in system, 10 inch touchable display, USB type external keyboard and mouse, operated by connecting to an external computer is available

4.       Manifolds System: patented V-Sorb monolithic manifolds system can improve sealing performance and reduce dead space largely, enhance system temperature uniformity and anti-interference ability, all lead to a high accuracy and repeatability data

5.       Splash-proof Measures: installed with a detachable filter in sample cell bottom, can prevent samples be suctioned into manifolds; inputting gas from bottom of cavity can avoid samples splash and software controlled H-Sorb two-stage-stepping mode further ends splash happening

6.       Sample Chamber: Exclusive G-DenPyc filling technology supports to choose different volume aluminum blocks to fill into testing chamber, this innovative method realizes minimal free space in testing chambers and improve data accuracy

Our policy of continuous development may cause the information and specifications contained herein to change without notice or liability.