Model S3 is equipped with 3 bypass motors. It is easy to use thanks to the control panel supplying real time data about the vacuum efficiency, it is easy to use but reliable. S3 is equipped with a control panel supplying real-time information about the vacuum efficiency. It is available with 50 or 100 liters containers, in stainless steel, with gravity unload system (plastic bag or Longopac), L-M-H certified or with absolute filter for the collection of toxic or fine dust, with nomex filter (ideal in case of collecting of hot substances), with electric filter shaker.: many versions for many different needs. From today it is easier working!