... 220V are both available Jowell Brand As clean room equipment, installed in the clean room entrance and used ... on personnel or goods entering through it, Automatic Blowing Air Shower, which is composed of case, fan(s), ... : 1.0 mm or 1.2 mm).The air shower time is adjustable from 1-99 seconds, ... sound in structure. An air shower passage can be made up of several air showers.Features:1.Photoelectric sensor ...