Description
The Vapor Pressure Analyzer or VPA measures the vapor pressures of solids, liquids and oils using the Knudsen effusion method.
All materials enter the vapor phase by sublimation (solid - gas) or evaporation (liquid - gas).
The vapor pressure of a material at thermodynamic equilibrium is a fundamental property of the material and is only a function of temperature.
The rate of mass loss through the orifice is measured by the Surface Measurement Systems UltraBalance.
The amount of sample which can be loaded varies between 1 and 100 mg and the experimental temperature range is between 20°C and 400°C.
The vapor pressure is an important material physical property that defines the amount of vapor phase material that exists in equilibrium with the original material. It is useful for a wide range of materials, including pharmaceutical products, pesticides in order to avoid toxic emissions.
