Brunauer, Emmett and Teller (BET) Theory Apparatus

V-Sorb 2800S BET surface area analyzer parameters

1. Analysis Method: static volumetric nitrogen adsorption principle

2. Versatility: Adsorption and desorption isotherms, Single and multi-point BET (Brunauer-Emmett-Teller)  surface area, Average particle diameter estimation, t-plot external surface area, True density analysis, Langmuir surface area, carbon black (STSA-Statistical thickness surface area), adsorption constant C.

3. Measuring Ranges: 0.01 m2/g (by nitrogen)/ 0.0005m2/g (by krypton) to no known upper limit

4. Accuracy: repeatability errors ≤1%

5. Vacuum System: V-Sorb unique monolithic manifolds and solenoid valve control system, greatly reduce the dead volume; improve the adsorbate micro-change sensitivity; enhance pore size distribution analysis resolution; decrease connecting points; strengthen sealing performance and prolonged instrument life

6. Coolant Level Prober: V-Sorb original coolant level control system with temperature probe, ensure the coolant level unchanged when compares with sample cells in the whole analysis process, completely eliminate the analysis errors caused by dead volume change

7. Sample Treatment: the whole treatment procedures are controlled by dedicated software, as well with a start time preset function which can realize unattended operation at night

8. Control System: programmable solenoid valve system with high integration and strong anti-interference ability, enhance instrument stability and life

9. Sample Ports: two samples analyzing and two samples degassing concurrently

10. Pressure Measurement: imported sectional measuring dual pressure transducer, notably improve the measuring accuracy at low P/Po point, 0-1000Torr (0-133Kpa), 0-10Torr (0-1.33Kpa)

11. Transducer Accuracy: imported silicon thin film pressure transducer, accuracy can reach 0.1% of real reading, better than 0.1% of F.S.(full-scale), far accurate than Pirani resistance vacuum gauge(general error is 10%-15%)

12. Partial Pressure: P/Po controllable accuracy range is 5x10^-6-0.998

13. Ultimate Vacuum: 4x10^-2Pa (3x10^-4 Torr)

14. Vacuum Pump: built-in bipolar vacuum pump controlled by patented software which can auto control pump’s start/stop 

15. 15.  Sample Types: powders, nanoparticle, fiber, flakes and other materials

16. Adsorbate Gas: high purity nitrogen (≥99.999%), Ar, Kr, CO, CO₂, C4H10 etc. non-corrosive gases are optional

17. Data Acquisition: high-precision and high integration data acquisition modules, minimal error, strong anti-interference ability

18. Data Reduction: Windows^?-based independent developed Gold APP Instruments software^TM, perfect versatility, produced full featured and multi-model reports

     

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