A mains electricity (AC-powered) device designed for total elimination and/or inactivation of microorganisms from medical devices and related products using pressurized steam (i.e., moist heat) as the sterilizing agent; it is used for products non-sensitive to high temperature, water, or steam. It typically includes a treatment chamber with shelves for device placement, and controls; it may be intended to sterilize wrapped and/or unwrapped devices. The device is available in a variety of shapes and sizes, including stand-alone (bulk) and tabletop units.