Gas alarm system and method

The embodiment of the invention, which relates to the fuel gas alarm field, provides a gas alarm system and method, so that a technical requirement on a technical staff can be reduced. The system comprises a gas detector, a gas alarm controller, and an alarm device. The gas detector is used for detecting concentration of leaked gas. The gas alarm controller connected with the gas alarm controller by a two-wire-system bus is used for determining the concentration, detected by the gas detector, of the leaked gas exceeds a preset threshold value and starting the alarm device when the detected concentration exceeds the preset threshold value. The alarm device connected with the gas controller by a two-wire-system bus is controlled by the gas alarm controller and is used for sending an alarm signal. 本发明实施例提供了种气体报警的系统及方法，涉及燃气报警领域，用以降低对技术人员的技术要求。所述气体报警的系统包括：气体检测器，用于检测泄露的气体的浓度；与所述气体检测器通过二线制总线连接的气体报警控制器；所述气体报警控制器，用于确定所述气体检测器检测的泄露的气体的浓度是否超出预设阀值，并在超出预设阀值时，启动报警器；与所述气体控制器通过二线制总线连接的报警器，受控于所述气体报警控制器，用于发出报警信号。