Flowsorb III - Surface Area Analyzer (Dynamic Flow)

The FlowSorb III measures surface area using the flowing gas method, which involves the continuous flow of an adsorptive and inert gas mixture over the sample at atmospheric pressure.

The FlowSorb III 2305/2310 provides single-point and multipoint BET surface area measurements with speed, accuracy and reliability. Samples having surface areas from 0.01 m2/g to over 1,000 m2/g are easily accommodated. The FlowSorb III’s reproducibility is better than 0.5%.

Confirmation of performance is desirable from time to time for every analytical instrument. The need for validation can arise from a change of operators, a peculiar result, an unfamiliar material, or simply from equipment wear and tear. Micromeritics products, with a few exceptions, do not require calibration per se; they derive results from well-established laws utilizing detection of basic parameters such as time, temperature, pressure, mass, and the like. Micromeritics instruments, nevertheless, are no exception to the desirability for periodic performance evaluation, because detectors, like everything else, age, drift, and occasionally fail.

An effective means for detecting operational mistakes or erroneous applications and for assuring consistent, reproducible results is to retain a quantity of one or more appropriate materials with known, well-characterized properties which can be used to test instrument performance. The reference materials subsequently listed by primary property are offered by Micromeritics for this corroborative purpose. Each has been carefully selected to be representative of the parameter, or parameters, for which it is recommended, to be non-hazardous, and to have an extended shelf life.

The lot of material from which each reference portion was extracted has been repeatedly analyzed. This has been done on a number of instruments, by different operators, and, in some cases, even using different techniques. We do not claim our reference materials to be standards. The extensive, blind testing utilizing independent laboratories which would enable us to make such a statement has not been undertaken. We are confident, nevertheless, and so assert, that an instrument giving the result, or results, within the limits specified with each reference material is operating satisfactorily.

When you order a reference material, you will receive with it information on how best to prepare it for analysis (for example, how to disperse it in a liquid, degas time and temperature, and the like), recommended quantity for a test as appropriate for the instrument in question, and other essential data (for example, density, starting diameter, flow path, etc.). Material properties are tabulated along with their limits of accuracy. As appropriate, a typical property trace such as a size distribution, an adsorption and desorption isotherm, or an intrusion and extrusion curve is included.


  • Ultra-stable detector eliminates drift and need for constant readjustment.
  • Cold trap conveniently located in front vs. side placement, as in other instruments. This placement reduces the chance of breakage as compared to side placement.
  • Single-injection calibration requires only one control setting. Adaptable to any non corrosive adsorbate mix.
  • All controls and displays are at eye/arm level, out of spill zone.
  • Built-in sample preparation.
  • The FlowSorb III 2310 features a built-in dewar elevator for completely automated analysis and rewarming fan for rapidly warming the sample tube to increase the speed of sample analysis. The thermal conductivity detector eliminates temperature-induced drift resulting in highly repeatable results.
  • Single-injection calibration provides fast start-up and high sample throughput.
  • The FlowSorb III 2305 features a dewar support latch system that provides one-hand convenience and safeguards against liquid nitrogen spills.
  • Five different types of sample tubes are available including a monolith-type tube for large samples.