DVS Resolution
Dual Vapor Gravimetric Sorption Analyzer
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.
Outstanding Performance:
Long Term Temperature Stability
Vapor generation and delivery at sample temperatureTypical stability at 25 °C is ±0.02 °CPrevents condensation issues found in instruments with
multiple temperature zonesAllows for accurate and stable humidity delivery
Humidity Performance
±0.1% RH of target humidityHighest 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 μgRoot mean square noise of ≤ 0.3 μg
True0™ RH
Only DVS instrument offering True0™ RHAchieve partial pressures of water as low as 0.0% RHStudy of hydrates and other compounds only completely
dry below 1% RHAllows investigation of sorption/desorption at low RH
levels
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