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The VSR-FE-2 features an adjustable electronic retard that helps prevent false alarms caused by brief water pressure fluctuations. The unit also includes an output relay that is activated when the flow of 10 GPM (38 LPM) or more occurs downstream of the device. The flow condition must persist long enough to overcome the selected retard period, ensuring that alarms are triggered only under valid fire conditions. In addition to standard wet sprinkler systems, the VSR-FE-2 can also serve as a sectional waterflow detector for large systems, enhancing its flexibility and performance for extensive f
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