Very useful for the restoration of the fluid sample, this apparatus enables to heat and agitate the sample to the reservoir temperature while pressurizing the same sample at the reservoir pressure using an external high pressure pump. The unit can be proposed into one, two or six cylinder versions. The sample cylinder is wrapped with an heating mantle and then mounted on the motorized rocking system to provide the mean to agitate the fluid under pressure and temperature for several days, if required. The chassis is equipped with four heavy duty casters which enable to move the apparatus very easily anywhere in the laboratory room. A control panel is used to enter and display the temperature and to start / stop the rocking mechanism.