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Surface Measurement Systems - DVS Resolution

The world’s most advanced DVS Instrument, the DVS Resolution is a dual vapor gravimetric analyzer that brings unparalleled capabilities and precisions to the study of complex sorption behaviors.

The instrument has the combined ability to precisely control and measure temperature and relative humidity while recording the highest resolution changes in mass.

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Technical Specifications

Temperature (Temperature-controlled enclosure)

Temperature controlled enclosure
Control range: 5 °C to 85 °C
Control precision: ±0.1°C
Enclosure also provides anti-condensation protection
High-temperature pre-heater for sample drying/activation Delivers local sample temperatures of up to 200 °C
Heating ramp rates: up to 5 °C / min
Sensor: Pt-100 thermocouple

Mass Measurement

Ultrabalance Low Mass Sample mass: between 1 and 1000mg
Mass change: ±150mg
Resolution (precision): 0.1 μg
Root mean square
balance noise: ≤ 0.3 μg
Ultrabalance High Mass Sample mass: between 10 and 5000mg
Mass change: ±1000mg
Resolution (precision): 1 μg
Root mean square
balance noise: ≤ 3 μg

Resolution Stand

Manifold: 316 stainless steel
Seals: Viton
Tubing: 1/4 inch stainless steel

Solvent Reservoirs

Material: Pyrex glass
25 and 0.5L as standard
2 Reservoirs included

Relative humidity generation, measurement, & sensor

High-accuracy digital mass flow controllers and capacitance probe Carrier Gas – Dry air or Nitrogen
Relative humidity range from 0 to 98%
RH range accuracy from 5 – 60 °C ±1%
RH range accuracy from 60 – 85 °C ±2%

Organic vapor measurement with Speed of Sound Sensor

High-accuracy digital mass flow controllers for vapor and gas delivery

Speed of Sound Sensor for organic vapors

In-line real-time Speed-of-Sound Sensor for organic vapor Partial Pressure (P/Po) measurements and control with a typical resolution of ±0.1% P/Po Automated zeroing of Speed of Sound sensor prior to each experiment
Carrier Gas – Dry air or NitrogenPartial Pressure range from 0 to 90%
Partial Pressure accuracy from 10 – 70 °C ±1%

Note: SMS limits the use of organic solvents to 20°C below their boiling points.


System Software

Next-generation purpose-built control and evaluation software for the most advanced experimental design and data analysis.

DVS Control

Complex protocols for multiple experimental sequences using sample pre-heating and conditioning; isotherm, isobar, and ramped humidity and organic vapor methods; single or dual vapor delivery and control; a fixed time or mass derivative steps.

Multiple-method protocols incorporating

•Sample pre-heating
• Vapor sorption
• Vapor exchange
• Dual vapor co-adsorption
• Temperature changes in a single experiment, including
• Ramp or step changes in relative humidity
• Automated video image acquisition
• Organic vapor sorption partial pressure
• Temperature stages may be based on fixed-time or user-defined dm/dt criteria
• Complex isotherm experiments
• Experiments may include half, full, or multiple partial pressure or temperature cycles


• Isotherms
• Permeability and diffusion
• Kinetics information
• Heat of sorption
• Tg determinations
• Amorphous content

21CFR Part 11 software solution is available for all DVS software upon request.

Solvents Available

Acetone Chloroform Cyclohexane Decane Dichloromethane Ethanol
Ethyl acetate Ethyl benzene Heptane Hexane Isopropanol Methanol
Nonane Octane Toluene Water M-Xylene p-Xylene

Key Benefits and Applications

  • The only system to measure organic vapor partial pressure directly using Ultrasonic Sensor (patent pending)
  • Open stainless steel stand design enabling easy access to sample pan while minimizing static electric charging
  • Broad range (5-85 °C) and single uniform and accurate temperature enclosure
  • Next-generation control and evaluation software for the most advanced experimental design and data analysis
  • Capable of upgrading to 5 balances
  • Optional IR, Raman, and Video imaging with integrated control softwar
  • Water, organic solvent, and gas sorption and desorption isotherms
  • Co-adsorption isotherms using two vapors
  • Optional in-situ sample preheating/drying to 200 °C
  • Multiple sorption/desorption and sample drying or activation cycles
  • Sample masses from 1 mg to 5000 mg
  • Surface and bulk measurement capabilities and analyses
  • Hygroscopicity of pharmaceutical solids
  • Tg and RH phase transitions in polymers
  • Amorphous content determination of solids
  • Diffusion and permeation in polymers
  • Food, flavors, and fragrances
  • Sorbents
  • Wood and cellulosic materials
  • Composites
  • Hydrophilic and hydrophobic materials
  • Biopharmaceutical and Biotechnology
  • Cosmetics & Personal Care
  • Education & Academics
  • Food & Beverage
  • Medical
  • Mining & Minerals
  • Pharmaceutical
  • Polymers, Plastics and Rubbers
Surface Measurement SystemsSurface Measurement Systems develops and engineers innovative experimental techniques and instrumentation for physico-chemical characterization of complex solids. We are the world leaders in Dynamic Vapor Sorption (DVS) technology and Inverse Gas Chromatography instrumentation and solutions, providing professional world-class scientific and technical support for our international customers.
[Dynamic Vapor Sorption (DVS) Instruments, Vapor Sorption Analyzer, Inverse Gas Chromatography Surface Energy Analyzer, Material Characterization Instrument, CO2 & H2O gravimetric sorption analyzer, carbon capture, utilization, storage]