This vacuum cleaner is essential for safely handling reactive and explosive metal powders, especially those used in 3D printing. The liquid bath, which can be filled with water or oil, prevents any potential ignition or explosion caused by the aspirated dust. The machine also features a special float inside the tank that halts suction when the inerting liquid is either absent or insufficient, ensuring the safety of the operators and the equipment. In addition, the brushed stainless steel construction of the machine and the practical drain tap make it easy to use and maintain. The safety valve on the tank ensures that any hydrogen concentration developed through hydrolysis when using water as an inerting liquid is expelled if aluminum powders are recovered. The coalescence filter of the vacuum cleaner retains any vapors that might be produced as a result of turbulence generated by air reflux.