There are many different methods of transfer under vacuum, each transfer device having its' particular advantages and disadvantages. The method(s) chosen are normally a ‘best compromise’ solution against price and performance.
Using a combination of several types of transport device allows multiple processes or experiments to be carried out on the same sample in several different locations within a vacuum system. Meeting these requirements means the transport system becomes a highly integral part of the system. Indeed, it means the vacuum system is designed with the transport system in mind.
There are also situations where it is not possible to use a certain type of transporter. An example is a magnetic linear drive; which should not be used where stray magnetic fields could be a problem. In these instances the choice of suitable transport device may be limited to just one.
