| 摘要 |
A gas detection system for use in multiple zones. The system includes a plurality of gas sensor assemblies, a central control, and an alarm. The alarm includes a plurality of indicator lights that are disposed at the central control, with a respective indicator light being in electrical communication with an associated gas sensor so as to allow the respective indicator light to illuminate when the associated gas sensor detects the gas and provide a visible alarm that is detected from a central location remote from the plurality of gas sensor assemblies, and a sound generator that is disposed at each sensor assembly, with a respective sound generator being in electrical communication with an associated gas sensor so as to allow the respective sound generator to activate when the associated gas sensor detects the gas and provide an audible alarm that is detected at the associated gas sensor. The central control includes an internal test circuit that periodically tests operation of the gas sensors, and if the test fails, activates the alarm, and an internal ventilator circuit that is operatively connected to and turns on a ventilation system in a zone when an associated gas sensor detects the gas.
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