In the mold of the channel between the warehouse and the machine has a suction pipe impediments,since there is no reference,for each transport safety have had to die hanging very high,this device is used magnets lowest point in the mold,reference can make use of the mold wall rises to the desired height,to improve efficiency and reduce energy consumption,limited due to the materials used,At a distance of 10 meters from the reference is generated within the error of 5 cm,but after several tests and improved to ensure safe use.