A mains electricity (AC-powered) device designed for total elimination and/or inactivation of microorganisms from medical devices and related products by immersion in sterilant solutions [e.g., formaldehyde, glutaraldehyde, ortho-phthalaldehyde (OPA) also known as phthaldehyde]; it is typically used for products sensitive to high temperature and humidity and not damaged by sterilant solution. It typically includes a treatment chamber with a container for liquid sterilant and where trays with the devices to be sterilized are manually placed, usually after cleaning of gross debris; a mechanism to introduce and/or circulate the liquid into the chamber; and controls to regulate procedure time.