Wednesday, 12 March 2008
A perfect vacuum is defined as a volume of space empty of all matter, something which is impossible to achieve in practice. As this is the ultimate definition of a vacuum the quality of any one particular vacuum is determined by it's gaseous pressure. The pressure in a perfect vacuum would be absolute zero, so the lower the pressure the higher the quality of vacuum.The quality of a vacuum can be divided into different classifications, as follows: Atmospheric pressure, low vacuum, medium vacuum, high vacuum, ultra high vacuum, extremely high vacuum, outer space, perfect vacuum. Highland Scientific stock construction items for the creation of high vacuum systems.
High vacuum systems are characterised by the mean free path (MFP) of it's residual gases being longer than the size of the chamber or object under testing. It generally needs pumping on a multi-stage level and ion gauge measurement. It can sometimes be differentiated between high vacuum and very high vacuum systems.
For a list of the construction items stocked by Highland Scientific please visit the main website.
