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Rapid BET Surface Area Analyzer

The Monosorb uses the rapid dynamic flow method for determinations of single-point BET surface area.


Speed - The Monosorb:

  • requires as little as 6 minutes to complete an analysis,
  • uses small quantities of sample resulting in short outgassing and analysis times,
  • utilizes the most modern and reliable method for extremely rapid and accurate BET surface area measurements,
  • doesn't require void volume measurements and ideal gas corrections.

The high degree of sensitivity of the Monosorb allows the use of samples weighing less than 1g and provides the measurement of surface areas as low as 0.01m2 .

The upper limit is over 250 in the cell. The reproducibility is better than 0.5%.

The accuracy of the Monosorb is limited only by the applicability of the single point method, which is usually better than 5% and on most samples errors less than 1-2%.

Versatility - The Monosorb permits the user to:

  • choose the correct concentration of adsorbate to give results identical to the multipoint method,
  • use many different adsorbates in addition to nitrogen, such as, argon, krypton, carbon monoxide, carbon dioxide and other non-corrosive gases,
  • use a wider variety of sample cells allowing measurements to be made on many diverse sample.


  • with the push of just one button, the sequence of adsorption, warming of the sample cell, desorption and display of the surface area, all occur without operator intervention.
  • AUTOCALIBRATE feature guarantees proper calibration at all times.
  • built-in Flow Controller provides the ultimate in flow stability.


The Thermoflow Degasser provides a flow-through preparation unit for the Monosorb surface area analyzer.

Functional Capability Monosorb
Surface Area Range 0.1 m2 to >250 m2
(0.01 m2/g to 3,000 m2/g)
Adsorbate* Nitrogen (standard operation)
Krypton (very low surface areas)
Carbon Dioxide
Ads/Des cycle Automatic
Dewar elevator Automatic
Desorption Hot air blower
Calibration loop 1cc
Analysis Stations One (quick disconnect fitting)
Preparation Station One (quick disconnect fitting)
Degas Temperature Room Temp to 350ºC (450ºC optional)
Gas compatibility Ar, Kr, He, CO2
Input Pressure(gauge) 140 kPa
Gas lines (supplied) quick disconnect to 1/8" swage
Dimensions Height 65 cm
Width 62.5 cm
Depth 32 cm
Weight 24 kg
Electrical 110-120 V or 220 V, 50/60 Hz
Environmental Ambient Temperature: 15-40ºC
Related Humidity: 20-90% (non-condensing)

* In a mixture with Helium

Read more about BET surface area & gas adsorption.

For more information contact us.

Monosorb BET Surface Area Analyzer


For more information contact us.