For the examination of extraction properties of supercritical water, eg for the decontamination of polluted soils, a special magnetic suspension balance was developed. Similar to the case for density measuring, the measuring cell and the suspension coupling form a unit to make a very compact device. The entire measuring volume is thermostated with an electrical heater to a maximum temperature of 500C and has a gradient free temperature level at all points so that the measuring fluid does not condense. In order to achieve an extremely wide pressure range up to 500 bar at such high temperatures, the entire suspension coupling has been produced with a special heat proof alloy of low magnetic permeability.
High temperature- high pressure magnetic suspension balance for mass transfer measurements in supercritical water (up to 500C and 500 bar) Pressure range: UHV to 500 bar Temperature range: up to 500C (entire measuring room incl. magnetic suspension coupling) Sample mass: up to 10 g Resolution: 0.01 mg