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| InstruQuest Inc. Scientific Instruments R&D |
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Home > Our Products > Gravimetric Systems
V-GA™ Versatile Gravimetric Analyzer
High capacity (typically 100/220g or 120g)
Sartorius semi-microbalance eg. CPA 225D
- Electromagnetic force compensation
- Thermal compensation
- Adaptable to noisy environments
- Integrated calibration weight
- Overload protection
- Readability (model dependent), typically 10 or 100 micrograms
- Superior accuracy and stability
V-GA isothermal chamber
- Temperature control of sample chamber from sub-ambient to 95C with stability +- 0.1C
- Temperature of experiment from sub-ambient to 60 C at full range of RH (standard model)
- Sample chamber size (5.2cm x 5.2cm x 12.8cm), different sizes optional
- High temperature digital RH probe (RH and T data) (in the vicinity of the sample)
- Additional temperature sensor (RTD) (in the vicinity of the sample)
- Proprietary design of vapors exhaust system and anti-condensation protection
- Uniform RH distribution (special diffuser)
- Dual gas/vapor entry ports
- Large area sample holders with fine mesh bottoms
- USB/Serial communication port for transfer of RH and temperature data to PC
- Small size of instrument (w/o balance): 23cm x 27cm x 38cm
- Options, like precision lift table or high temperature internal furnace with temperature ramping (up to 400C) can be implemented
Sartorius semi-microbalance eg. CPA 225D
- Electromagnetic force compensation
- Thermal compensation
- Adaptable to noisy environments
- Integrated calibration weight
- Overload protection
- Readability (model dependent), typically 10 or 100 micrograms
- Superior accuracy and stability
V-GA isothermal chamber
- Temperature control of sample chamber from sub-ambient to 95C with stability +- 0.1C
- Temperature of experiment from sub-ambient to 60 C at full range of RH (standard model)
- Sample chamber size (5.2cm x 5.2cm x 12.8cm), different sizes optional
- High temperature digital RH probe (RH and T data) (in the vicinity of the sample)
- Additional temperature sensor (RTD) (in the vicinity of the sample)
- Proprietary design of vapors exhaust system and anti-condensation protection
- Uniform RH distribution (special diffuser)
- Dual gas/vapor entry ports
- Large area sample holders with fine mesh bottoms
- USB/Serial communication port for transfer of RH and temperature data to PC
- Small size of instrument (w/o balance): 23cm x 27cm x 38cm
- Options, like precision lift table or high temperature internal furnace with temperature ramping (up to 400C) can be implemented
The main components of the modular V-GA flow system:
Selection of one of the two RH generators:
V-Gen
humidity generation module.. pdf file
humidity generation module.. pdf file
HumiSys LF
Low Flow humidity generator..pdf file
Low Flow humidity generator..pdf file
(Each of the RH generators can be used separately for
other applications and the operational software is provided.)
other applications and the operational software is provided.)
Typical Applications
- Monitoring the sample mass uptake or loss as a function of time by varying relative humidity or
temperature (or both).
- Study of permeability of different vapors through membranes, fabrics in controlled RH and temperature
environment using special cells.
- Possible expansion to density and surface tension measurements.
- Monitoring the sample mass uptake or loss as a function of time by varying relative humidity or
temperature (or both).
- Study of permeability of different vapors through membranes, fabrics in controlled RH and temperature
environment using special cells.
- Possible expansion to density and surface tension measurements.
Advantages
- More representative sample can be used
- No limit on dynamic range (compare to 500mg or +-200mg of other microbalances)
- Large selection of balances and weighing modules to satisfy any application
- Easy installation by the user, virtually maintenance free
- Independent modules, each with its own software
- Robust, easy to service and operate
- Perfect for R&D and industrial QC environment
- Economical to use (air can be supplied from a compressor)
- Special applications can be easily addressed
- Independent use of modules for other purposes, e.g. RH Generator
- Ability to measure water vapor transport rates, WVTR, using special cells
- Capability of determining of organic vapors permeability through membranes
- Ability to determine deliquescence points
- Low cost
- More representative sample can be used
- No limit on dynamic range (compare to 500mg or +-200mg of other microbalances)
- Large selection of balances and weighing modules to satisfy any application
- Easy installation by the user, virtually maintenance free
- Independent modules, each with its own software
- Robust, easy to service and operate
- Perfect for R&D and industrial QC environment
- Economical to use (air can be supplied from a compressor)
- Special applications can be easily addressed
- Independent use of modules for other purposes, e.g. RH Generator
- Ability to measure water vapor transport rates, WVTR, using special cells
- Capability of determining of organic vapors permeability through membranes
- Ability to determine deliquescence points
- Low cost
Windows® based operational software for
the combined modules
- Intuitive design of experiment protocols and saving them for reuse
- Isothermal profiles
- Iso-humidity profiles
- Isobars
- Fast run
- Up to 1000 steps per run
- Ability to select and combine several equilibrium criteria
- Calculation utility for solving variety of "RH problems"
- Graphing, generating reports, viewing previous data
- Ability to modify experiment parameters at any time
- USB/Serial communication with a PC
- Automated installation
the combined modules
- Intuitive design of experiment protocols and saving them for reuse
- Isothermal profiles
- Iso-humidity profiles
- Isobars
- Fast run
- Up to 1000 steps per run
- Ability to select and combine several equilibrium criteria
- Calculation utility for solving variety of "RH problems"
- Graphing, generating reports, viewing previous data
- Ability to modify experiment parameters at any time
- USB/Serial communication with a PC
- Automated installation
