The core of this apparatus is a high pressure cell, equipped with two sapphire windows, with a volume of 580 cm3 + volume of the gas cylinder attached to it, which can be varied between 150 cm3 and 1000 cm3 (by changing the cylinder).
The cell is inside a temperature chamber, with an available volume of 720 dm3 and an operating temperature range from -40ºC to 150ºC.
The temperature of the cell is monitored through two platinum resistance thermometers PT100 class 1/10 DIN and the pressure inside the cell is monitored by a temperature compensated pressure transmitter for measurements up to 200 barg. All the sensors are connected to a computer.
The apparatus is depicted bellow:
A: High pressure cell with two sapphire windows.
B: Pressure sensor.
C: video camera.
D: Temperature sensors Pt100 class 1/10 DIN.
E: Remote control for the magnetic stirrer.
F: Light source with optical fibre.
G: Data logger.
H: Computer.
I: Monitor associated with video camera.
J: Temperature chamber.
Publications
José M.S. Fonseca, Nicolas von Solms, "Synthetic methods in phase equilibria: A new apparatus and error analysis of the method." J. Supercritical Fluids 86 (2014) 49– 56