A mains electricity (AC-powered) device designed for total elimination and/or inactivation of microorganisms from medical devices and related products using vapours (or gases) in plasma state; it is typically used for products sensitive to high temperature and humidity. It typically includes a treatment chamber with shelves where the devices to be sterilized are placed, usually after cleaning of gross debris and then packed; a means to introduce the vapour [e.g., hydrogen peroxide (H2O2)] into the chamber; electrodes that are activated to convert the vapour into plasma; a radio-frequency generator; and cycle controls. The device is available in stand-alone (bulk) and tabletop units.