Speed of Sound Dynamic Vapor Sorption (DVS) –

“The only method to directly measure solvent concentrations.”

Surface Measurement Systems introduced new DVS products last year. These instruments extend the capabilities of our Dynamic Vapor Sorption family of instruments by introducing a revolutionary new sensor. The speed of sound sensor increases the reliability and accuracy of DVS data by providing the only method for directly measuring solvent vapor concentrations.


Speed of sound is the only method to directly measure solvent concentrations over a wide range of temperatures and partial pressures.

Previous methods for measuring solvent concentrations have either been non-existent or predicted the concentration. Our previous DVS Advantage measured solvent concentration with a calibrated dew-point-analyzer. Customer demand for a universal, accurate measurement technology led Surface Measurement Systems to developed this revolutionary new sensor.

The patent-pending sensor measures vapor concentration directly using the speed of sound. This measurement is directly related to temperature, the gas phase species present, and its concentration.

This technology allows for closed-loop control by adjusting vapor delivery using real-time measurements. Not only is the SOS measurement fast (1s), it is reliable and a fundamental gas phase property.

Our three new DVS systems based on the speed of sound technology are the DVS Adventure, DVS Resolution, and DVS Endeavour. We named our systems after Captain Cooke’s famous ships because of their legacy of discovery. We are certain that our new speed of sound based DVS systems will help you make your own discoveries. Explore more details on the systems below.

DVS Resolution

Key measuring capabilities:

  • Water, organic solvent, and gas sorption and desorption isotherms
  • Co-adsorption isotherms using two vapors
  • Optional in-situ sample preheating/drying to 300 oC
  • Multiple sorption/desorption and sample drying or activation cycles
  • Sample masses from 1 mg to 5000 mg
  • Surface and bulk measurement capabilities and analyses
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DVS Endeavour

Key measuring capabilities:

  • Simultaneous 5X sample measurement
  • Organic and Water vapor sorption kinetics
  • Organic vapor sorption in a fixed RH background
  • Real-time partial pressure measurement and control
  • Water vapor sorption isotherms from 5 to 85 oC
  • Organic vapor sorption isotherms from 5 to 50 oC
  • In-situ drying of samples to 300 oC
  • Optional Color Video Microscopy/Fiber Optic Probe Spectroscopy
  • True0™ drying at 0.0% RH
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