DVS Endeavour

DVS Endeavour

5X Parallel Gravimetric Sorption Analyzer

A key feature of DVS Endeavour is the ability to precisely control and measure temperature and relative humidity while simultaneously recording the highest resolution changes in mass on up to 5 samples. Additionally Organic vapor partial pressures can now be directly measured using Surface Measurement Systems’ Speed of Sound sensor (patented). In a typical experiment a known concentration of water vapor or organic vapor is delivered over a sample placed inside the sample pan. The sample pan is connected to the Surface Measurement Systems Ultrabalance measuring real-time mass changes caused by sorption or desorption of water and/or organic molecules.

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Outstanding 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 and organic vapor sorption isotherms from 10 to 70 °C
  • In-situ drying of samples to 200 °C
  • Optional Color Video Microscopy
  • True O drying at 0.0% RH

Temperature controlled enclosure
Control range: 10°C to 70oC
Control precision: ± 0.1oC
Enclosure provides anti-condensation protection.

Delivers local sample temperatures of up to 200 °C
Heating ramp rates: up to 5 °C / min
Sensors: Pt-100 thermocouple

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

Material: glass
0.5 L as standard

High accuracy digital mass flow controllers for vapor and gas delivery

Speed of Sound Sensor for organic vapors

Carrier Gas – Dry air or Nitrogen
Partial Pressure range from 0 to 90%
Partial Pressure accuracy from 10 – 70 °C ±1%

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

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

Solvents available:

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

Sensor

Capacitance probe

Carrier Gas – Dry air or Nitrogen

Water vapor generation range and accuracy:
• 0% to 98% (±0.5%) RH for 10°C to 45°C 1
• 0% to 85% (±1%) RH for 45°C to 70°C 1

11-σ confidence level with %RH or P/Po calibration performance based on SMS factory certified
methods (Salts Calibrations or equivalent method)

In-line real time Humidity Probe for Relative Humidity measurements and control with a resolution
of 0.1% RH

Generation & Measurement

High accurate digital mass flow controllers and capacitance probe

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; 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

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

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

Ultrabalance Low Mass
Maximum load: 1000 mg
Mass change: ±150 mg
Resolution: 0.01 μg
Balance noise: ≤ 0.3 μg

Ultrabalance High Mass
Maximum load: 5000 mg
Mass change: ±1000 mg
Resolution: 0.1 μg
Balance noise: ≤ 3 μg

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DVS Endeavour Schematic
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For more information, email [email protected].