DVS Advantage combines the best in microbalance, gas flow and vapor measurement technologies to deliver unsurpassed performance in terms of experimental design as well as instrument accuracy and repeatability.
The Advantage uses a dry carrier gas, usually nitrogen, and the user can select one of any two vapor sources. Precise control of the ratio of saturated and dry carrier gas flows is enabled with mass flow control combined with the use of unique real time vapor concentration monitoring for both water and organics. A known concentration of the selected vapor then flows over a sample suspended from a recording ultra-microbalance, which measures the weight change caused by sorption or desorption of the vapor molecule. It is these dynamic flow conditions that enable the sorption/desorption process to be so rapidly studied.
The sample may be pre-heated if desired as a further experimental option, and which in some cases may speed up the analysis cycle time as in the case of bulk absorption or the drying of inorganic hydrates. This heating canbe as a single step, or at a controlled ramp rate of temperature.