S-B57 Vertical Air Tester is specially designed for big round can. With special detection elements to get an excellent detecting performance, even small pinhole can be detected easily. Empty can is lifted up by cam to let a plug enter can to occupy some can inside volume then fill compressed air into can. Certain time later, an electronic precise pressure sensor is to detect mini pressure variation inside the can., nonconforming can is ejected out by air blowing. With vertical inlet/outlet conveyor , easy to link and work with seamer. Easy for can size changeover and maintenance.