THE BASEMENT WATCHDOG Model BWD-HWA 110 dB Battery Operated Water Alarm Price: $12.48 (as of 02/01/2024 23:17 PST- Details)

Detects as little as 1/32 in. of water to offer an effective early warning system
Solid-state circuitry is extremely sensitive and reliable
Loud 110 dB alarm can be heard throughout the house