Advantages
1.Saving the water,
2.Saving the electricity, and
3.Saving the ground water.
4.prevents overflow of tanks
Disadvantages
1.If the switch is broken, sound will be irritating
2.if the battery is low it will stop working

by pranav aaditya VII std

A water detector is an electronic device that is designed to detect the presence of water and provide an alert in time to allow the prevention of water damage. A common design is a small cable or device that lies flat on a floor and relies on the electrical conductivity of water to decrease the resistance across two contacts. The device then sounds an audible alarm together with providing onward signalling in the presence of enough water to bridge the contacts. These are useful in a normally occupied area near any infrastructure that has the potential to leak water, such as HVAC, water pipes, drain pipes, vending machines, dehumidifiers, or water tanks.
A water alarm is a device that beeps if it comes in contact with water. Its purpose is to check for leaks under the sink although other variations are available to help wake people who urinate in their sleep.
It is used mainly around areas that have the potential to leak water. A water alarm requres a buzzer to beep.it is useful as prevents overflow of tanks buckets etc Appliance and plumbing leaks are unpredictable and can happen at any time, potentially filling an unattended building with water. RDT delivers the most diverse, innovative selection of water leak alarm and automatic water shut-off systems in the industry.