Tank Alert® alarms provide audio/visual warning of potential threatening liquid level conditions. The Tank Alert® AB (auto reset, battery backup) indoor alarm system provides audio/visual warning of potential threatening liquid level conditions in lift pump chambers, sump pump basins, holding tanks, sewage, agricultural and other water applications. If an alarm condition occurs, the horn sounds and alarm light activates. The horn can be turned off, but the alarm light remains on until the condition is remedied. Once the condition is cleared the alarm will automatically reset.