The Cylinder Accountability System (aka: CATSII) is a system designed to assist the Fire Department in managing SCBA air fills, hydrostatic testing information tracking and alert, and user tracking ( who is doing the filling).The system manages the ability to fill and SCBA bottle based on whether hydrostatic testing date is current, will only allow fill to the pressure set in the system, not what the regulator is set at. Each SCBA bottle has an assigned QR tag which is epoxied to the cylinder so it cannot be removed, and programmed with the cylinder information to include serial number, manufacture date, Life span date, and maximum fill pressure.