Abstract: The hydrogen peroxide gas supplying apparatus to be sterilized by the method of the invention comprises a hydrogen peroxide gas transport air pipe extending from an air source to the location of the article to be sterilized by way of a closed gasifying tank having a heater incorporated therein, and a microorganism removing filter provided on the air pipe and positioned upstream from the gasifying tank. The apparatus is sterilized by supplying an aqueous solution of hydrogen peroxide to the gasifying tank while supply of air from the air source to the air pipe is discontinued so that the solution is gasified by being heated with the heater.

Abstract: An apparatus for supplying a liquid under a constant pressure comprising a supply tank disposed at a higher lever than articles, i.e.

Abstract: An apparatus for determining the rate of discharge from a nozzle for spraying an aqueous solution of hydrogen peroxide comprises a pressure sensor for detecting the internal pressure of a pipe for supplying the solution to the nozzle under elevated pressure, and means for determining the rate of discharge from the pressure detected by the pressure sensor and the predetermined relationship of the discharge rate of the nozzle with the internal pressure of the pipe.