• Measures porosity and pore size distribution
  • Non-destructive, simple sample preparation
  • Automated, high throughput
  • Same instrument measures specific surface area of porous and non-porous solids


What is Physisorption?

Physisorption, also known as physical adsorption, is the process by which gas or vapor molecules are attracted and adhere to the surface of a solid material. This adsorption occurs due to weak intermolecular forces, such as van der Waals interactions, without forming chemical bonds. Physisorption is a reversible phenomenon and is utilized to characterize the surface properties of materials, including surface area, pore size distribution, and surface energetics.

This important analysis finds application across many industries, including battery anodes and cathodes, catalyst characterization, zeolites, MOFs, absorbents, artificial bone, pharmaceuticals, ceramics, metal powders for additive manufacturing, and a diverse range of other applications and industries.Micromeritics has an extensive range of physisorption analyzers offering a wide range of solutions to realize your R&D, quality control, and manufacturing needs.

Adsorption and condensation of gas into pores to determine surface area, pore size, volume, and distribution

Desorption of gas molecules with increasing temperature at atmospheric pressure.

Micromeritics Physisorption Instruments

TriStar II‚ÄĮPlus

  • Highest-throughput automated BET surface area analysis
  • Three-sample parallel measurements maximize productivity
  • Independent sample port transducers, a dedicated vacuum system, and a computer-controlled servo valve provide the shortest available measurement time for multi-sample analysis
  • Available Krypton configuration for low surface area materials
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Gemini VII Rapid & Precise Surface Area Analysis

Gemini VII

  • Unique differential measurement design
  • Fastest individual surface area measurement
  • High accuracy for low surface area using N2 gas
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ASAP 2460 Surface Area & Porosimetry System

ASAP 2460

  • Two to Six parallel measurements for high throughput in a single system.
  • Independent analysis maximizes flexibility including multi-gas analysis
  • Available micropore capability for pore size and distribution of microporous materials
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Flex & 3Flex

  • Advanced gas adsorption system
  • Highest performance micropore analysis
  • Vapor analysis
  • Static chemisorption and dynamic temperature-programmed reactions available
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