Sterilizing tunnel is a tunnel like region, responsible for dry heat sterilization and depyrogenation of containers, vials, bottles, ampoules etc. The containers are sent to the sterilizing tunnel through a conveyor belt and sterilized with the help of heated air flow, which is generated by means of a fan and a heater. These highly efficient sterilizers make use of laminar air flow to sterilize glass vialsampoules and bottles.