A water leak alarm is an electronic device that alerts you when it comes into contact with moisture. It is a bit like a smoke detector but for water leaks.
Water leak alarms are generally just referred to as leak alarms. They can also be called leak detectors.
They can be used in any household or business, by anybody. They idea is that they will alert the user to leaks before any major damage occurs.
Water leak alarms are powered by a battery, which they are generally supplied with, most commonly 9V (also called square or PP3) or 23A (12V) batteries.
Water leak alarms draw attention to leaks using a sound alarm. This alarm is generally above 80 decibels: that’s around the same noise as a vacuum cleaner, when you are the one doing the vacuuming.