DVS Resolution
Dual Vapor Gravimetric Sorption Analyzer
The world’s most advanced DVS Instrument, DVS Resolution is a dual vapor gravimetric analyser, with key feature, is the combined ability to precisely control and measure temperature and relative humidity while recording the highest resolution changes in mass. DVS Resolution uses a dry carrier gas typically nitrogen or compressed air for its operation. Digital mass flow controllers regulate flows of dry and saturated gases.
Relative humidity is generated by precisely mixing dry and saturated gas flows in desired flow ratios which produce expected relative humidity. In a typical experiment a known concentration of water vapor is delivered over a sample placed inside the sample pan connected to the Surface Measurement Systems UltraBalance™ measuring realtime mass changes caused by sorption or desorption of water molecules. Prior to sorption measurements, the sample can be in-situ preheated/dried at temperatures of up to 200 oC.
Additionally, the sample chamber and water vapor generation are at thermal equilibrium in a single temperature enclosure allowing for operation over the entire temperature range (5-85°C) without risk of condensation.
Download the brochure | Request a Quote |
Outstanding performance
Long Term Temperature Stability
- Vapor generation and delivery at sample temperature
- Typical stability at 25 °C is ±0.2 °C
- Prevents condensation issues found in instruments with multiple temperature zones
- Allows for accurate and stable humidity delivery
Humidity Performance
- Highest level of humidity precision in any instrument we’ve ever produced
Balance Baseline Stability over 24 hours
- Mass changes at a resolution of 0.1 μg
- Root mean square noise of ≤ 0.3 μg
- 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
True0 RH
- Only DVS instrument offering True0 RH
- Achieve partial pressures of water as low as 0.0% RH
- Study of hydrates and other compounds only completely dry below 1% RH
- Allows investigation of sorption/desorption at low RH levels
| Key measuring capabilities: |
|
| Key hardware benefits: |
|
Raman Spectroscopy
Optional Microscopy and Video
High Temperature Preheater for Drying, Curing and Vapor Generation at Elevated Temperatures
|
Control range: 5 °C to 85 °C
Control precision: ±0.1°C
Enclosure also provides anti-condensation protection
Delivers local sample temperatures of up to 200 °C
Heating ramp rates: up to 5 °C / min
Sensor: Pt-100 thermocouple
Seals: Viton
Tubing: 1/4 inch stainless steel
0.25 and 0.5L as standard
2 Reservoirs included
High accurate 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%
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
Chloroform
Cyclohexane
Decane
Dichloromethane
Dichloromethane
Ethanol
Ethayl acetate
Ethyl benzene
Heptane
Hexane
Isopropanol
Methanol
Nonane
Octane
Toluene
Water
M-Xylene
p-Xylene
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
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
[/fusion_old_tab]
DVS Resolution Schematic |
For more information, email [email protected].
See also:
