In the field of process automation, Laser Metrologie designs and implements pneumatic solutions in complement to the digital solutions: for example to produce a system of economic displacement in two positions using a double effect jack associated with a guidance system and two mechanical end of stroke equipped with hydraulic dampers. For more complex cases of unit part distribution with several geometric references, we will use an electro-pneumatic solution that will implement a bank digitally adjustable in position and a separation of pneumatic pieces with double effect jacks.