Xemis-002 Next Generation Pure Gas and Vapor Sorption Analyzer

High resolution gas & vapor sorption analyzer, with next generation microbalance design for high pressure & corrosive capability

  • Model: XEMIS-002
  • Manufacturer: Hiden Isochema

The XEMIS series are high accuracy gravimetric sorption analyzers operating to 200 bar. Changes in sample mass are measured as a function of applied temperature and pressure to determine isotherms, isobars and sorption kinetics. Designed for operation with a full range of gas and vapor species including corrosives and flammables, the XEMIS series features active pressure regulation from 10-2 mbar: a controllable pressure range covering 7 orders of magnitude.

The XEMIS series offers reproducible, high resolution, high accuracy measurements even with small sample sizes or small uptakes, and performance unrivalled in a high pressure sorption analyzer.

  • Isotherm, isobar and high pressure TGA measurements in a single automated analyzer
  • Compatible with flammable, corrosive and toxic gases and vapors
  • Symmetric geometry, with ultra-low total system buoyancy for high accuracy measurements at high pressures
  • Measurements at temperatures from 77 K to 500 °C
  • Fast and accurate analysis of equilibria and kinetics using the IGA method
  • Full automation and advanced programmability


Hiden Isochema’s unique IGA method is applied independently to every step in a gravimetric sorption measurement. At each step, the pressure and temperature are actively regulated, with resultant changes in sample weight continuously recorded.

The kinetic weight data is analyzed in real-time, and the trend toward equilibrium is predicted and displayed on screen. Equilibration criteria are applied to objectively determine the period allowed before the measurement moves on to the next pressure or temperature value. Each equilibrium point is plotted on an isotherm or isobar, and the full raw data is also recorded.

The IGA method therefore allows consistent analysis with optimum measurement accuracy and faster overall process times.


  • Widest controllable pressure range of any gravimetric sorption analyzer: active pressure regulation over 7 orders of magnitude
  • Unique Exosensing Technology for operation with aggressive species
  • Optimized performance for sample sizes from 1 mg to 5 g


Typical applications include:

  • VOC filtration
  • Thermochemical energy storage
  • Toxic gas storage and separation


  • Kinetics of hydrogen absorption by palladium at 303 K and 40 mbar

  • Water adsorption on a Zeolite powder

  • DMF adsorption by a Metal-organic framework

  • Nitrogen, carbon dioxide and sulpher dioxide adsorption isotherms on a MOF across a broad pressure range. Data reproduced with permission from John Wiley and Sons.
  • Methane adsorption by a shale at high temperature and pressure

  • Sulfur dioxide adsorption by a metal organic framework (NOTT-300)

  • Excess Hydrogen uptake for a 22mg carbon nanotube. Data reproduced with permission of The Royal Society of Chemistry

XEMIS Brochure


XEMIS Application Note


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