120dB High Low Water Level Sensor Alarm Strobe Siren 16.4ft Cord

You can DIY yourself, the alarm will be triggered when the two wires on the probe are shorted. The overflow probe is placed above the water level. When the water level rises to the detection position, the float will rise and trigger the magnetic induction, thus triggering the alarm.

Wireless Water Level Monitor – Battery Operated with Float Sensor

Experience peace of mind with our Wireless Water Level Monitor, expertly designed to prevent leaks and flooding. – Battery Operated with Float Sensor. Designed for versatility; default setting monitors for high water levels, while flipping the float ring easily adjusts the function for low water level detection — perfect for aquariums, ponds, and storage tanks.