Water leakage alarm device based on fire alarm system

The utility model discloses a fire-fighting alarm system-based water leakage alarm device, which comprises a water immersion detector, an electromagnetic relay and an input module, the water immersion detector is arranged at a preset water leakage detection position, the water immersion detector is configured to trigger and output a water immersion electric signal when encountering water, the electromagnetic relay comprises a coil and a normally open switch, and the input module is connected with the coil. The coil is electrically connected with the water immersion detector, and the normally open switch is electrically connected with the input module; the coil is triggered by the water immersion electric signal to close the normally open switch, and the input module is configured to output an alarm signal to a fire alarm system when the normally open switch is closed. According to the water leakage alarm device provided by the utility model, the electromagnetic relay is used for realizing electric signal isol