The all new AquiTron AT-G-ALERT refrigerant gas sensor is designed to provide continuous monitoring in occupied spaces for refrigerants associated with high-efficiency, high volume refrigerant cooling and heating systems, such as VRF/VRV (Variable Refrigerant Flow/Variable Refrigerant Volume) systems. Typical applications include hotels, office buildings, schools, dormitories, hospitals, homes and apartment buildings. The AT-G-ALERT audible and visual alarms alert occupants and simultaneously communicate to Building Management Systems (BMS). Two on-board relays can be used to close valves, activate further alarm devices and exhaust fans or initiate emergency calls to rescue teams.