Newster Sterilbox is a machine used to wash and sanitize hospital waste containers made in special plastic materials. This industrial front-loading bin washer is fitted with four 22 W ultraviolet lamps in the washing chamber. It has a 55x61 cm stainless steel tub, with a door aperture of 65 cm. The ultraviolet lamps have a microbiocidal action and sterilize the surfaces, liquids and air inside the washing chamber. The bactericidal activity of the ultraviolet radiation inactivates the DNA and RNA nucleic acids of cells, acting on the pyrimidine bases (thymine, cytosine, uracil) to trigger the formation of atypical dimers that destabilize the hydrogen bond with the complementary bases and impede the normal replication processes of the nucleic acids. The position of the lamps ensures uniform irradiation in the entire compartment, thereby guaranteeing the exposure of all container surfaces to the germicidal action of the ultraviolet lamps. The lamps are switched on when the washing cycle starts, and are switched off automatically before the final rinsing cycle. The machine is equipped with a safety switch that prevents the lamps from being switched on until the sliding door has been fully closed, also automatically switching them off in case of malfunctions when the door is opened. This prevents all accidental exposure of operators to ultraviolet radiation during bin loading and unloading operations.