Vacuum

DVS Vacuum

Dynamic Vacuum Vapor & Gas Gravimetric Sorption Analyzer

The adsorption of vapors on porous materials is important and vital within numerous industries. Traditional gravimetric methods are based on using a ‘static’ vacuum technique. This method is limited by the fact that ‘out-gassing’ of the vacuum chamber contents significantly contributes to the measured pressure and hence to the sorption measurements.

You can now enjoy the capability of obtaining accurate sorption properties of your materials using solvents and gases using our latest DVS Vacuum analyser.

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Key measurement capabilities:
 

  • Adsorption and desorption under dynamic/static, isothermal, or isobaric conditions.
  • Competitive adsorption of two probe molecules (i.e. CO2–H2O, Toluene–H2O, MeOH–H2O)
  • Perform multi-component experiments using vapor and/or gas sorbate molecules
  • Unique vapor temperature and delivery control
  • In-situ sample degassing up to 400°C and high vacuum (2×10-6 Torr)
  • Multiple adsorption/desorption and sample regeneration cycles
  • Real-time sorption kinetics and thermodynamics
  • Experimental background pressures as low as 1×10-6 Torr
  • Adsorption measurements at relative pressures as low as 0.005 Torr
  • Minimum deliverable relative water vapor pressure at 25oC of 0.05%
  • Sample masses from 5-1000 mg

 
1. Temperature  

  • Temperature controlled enclosure
  • Control range: 20°C to 70°C
  • Regulation accuracy: ±0.2°C
  • Enclosure also provides anti-condensation protection

 
2. Weight measurement  

  • High Resolution microbalance
  • Sample mass: between 1 and 1000mg
  • Mass change: ±150mg
  • Resolution (precision): 0.1 μg
  • Peak to peak noise: ≤ 0.3 μg

 
3. Pressure measurement  

  • 1000 Torr Baratron full scale from 0.01 up to 1000 Torr (standard)
  • 10 Torr Baratron: full scale from 0.005 up to 10 Torr (standard)
  • Other ranges available upon request (100 and 500 Torr)
  • Accuracy: ±0.5 of Reading
  • Resolution: 0.01% of full scale

 
4. Vacuum pressure measurement Vacuum pressure transducer: full scale from 1×10-8 Torr up to 760 Torr
5. Computer hardware and software The system is fully automated and controlled by purpose-built software. Data can be analyzed in real time using analysis software.