Vertrieb von wissenschaftlichen Geräten GmbH

Specific surface area and pore size distribution / Vapor adsorption



BELSORP-maxII is an innovative, high-resolution and flexible gas sorption system for the determination of adsorption and desorption isotherms, specific surface areas, pore sizes and pore volumes.

  • The highest throughput instrument with simultaneous measurement up to 4 samples.

  • New advanced function "GDO (Gas Dosing Optimization)". The best suitable measurement conditions are automatically set using saved customer`s adsorption isotherm data.
  • An advanced system of direct evacuating and intelligent valve control reduces the measurement time significantly.
  • High precision vapor adsorption measurement under strict temperature control.

  • High precision measurement by Advanced Free Space Measurement(AFSMTM)

  • LN2 automatic supplier and the dedicated heater enable fully automatic seamless process control from pretreatment to measurement.

  • The advanced GCMC method is featured, which enables to perform more precise and higher resolution PSD analysis considering the interaction of actual material surface and adsorbate molecules than the conventional NLDFT (approx. calculation) method.

  • The measurement process status and the results can be checked from new remote monitoring function using e-mail system.



Measurement principle

Volumetric method + AFSMTM

Adsorption gas/vapor   

N2, Ar, Kr, CO2, H2, O2, CH4,NH3, other non-corrosive gases
H2O, MeOH, EtOH, C6H6, other non-corrosive vapor

Analysis ports

4 ports + 1 dedicated p0-port

Measurement range

Specific surface area: 0.01 m2/g and above (N2), 0.0005 m2/g and above (Kr)
Pore size distribution (in diameter): 0.35 ∼ 500 nm

Pressure transducer*

6 x 1000 Torr
4 x 10 Torr
3 x 0,1 Torr

Gas port

2 (Available to add up to 12 ports)

Vapor port


Vacuum pump

Rotary vacuum pump (or dry diaphragm pump) + Turbo molecular pump

Pretreatment heater (Option)

50 ∼ 550°C (4 ports)

Full automatic measurement heater*

50 ∼ 450°C (3 ports)

Water bath (Option)

50 ∼ 70°C (4 ports)

Dimensions and weight

600(W) X 1020(H) X 680(D) mm, 130 kg

 * Can be changed according to the specifications. 


25 Jahre Years POROTEC - Thank you very much


28. - 29. November 2019
38. Hagener Symposium Pulvermetallurgie
Hagen more ...