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
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
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 |
For more information, email [email protected].
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