Mobile vacuum suction system for extremely sensitive gas detection. Article comprises carrying system / backpack with vacuum technology and a rechargeable battery pack. Additional accessories (handpiece, probes, hoses, charger, etc.) are required and must be ordered separately. Minimum equipment is as follows: - Carrying system / backpack (412010) - Handpiece (412024) - Bell probe (412025) - Handpiece connection hose (412029) - Measuring device connection hose (412031) - Charger (412050)