| InstruQuest Inc. Scientific Instruments R&D |
Home > Our Products > Gravimetric Systems
pdf. format
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
-V-Gen - humidity generation module... please review.pdf file
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
- 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
| GRAVIMETRIC SYSYTEMS |
2004 -2010 Copyright © InstruQuest, Inc. All rights reserved.
The main components of the modular V-GA flow system:
-HumiSys LF- Low Flow humidity generator ... please review.pdf file
Selection of one of the two RH generators:
(Each of the RH generators can be used separately for other applications and the operational software is provided.)
or
