This simple water level
sensor circuit monitors the
presence of water in a certain location or container. The circuit sends an
acoustic alarm when it senses a drop
of water leak. It is very simple to build and it is made of a single IC and
some passive components. Check out the water level indicator circuit
too.
The
IC LM1801 is a low power comparator that
can deliver high output current
if needed. When water hits the sensor, the reference voltage is overshot and the IC drives the ceramic transducer to
beep. It is also possible to connect several sensors to the water level monitor
circuit. The sensor can be easibly made out of a small piece of PCB that is
etched with the proper pattern. The decoupling capacitor C3 is a 100uF/16V
electrolytic capacitor.
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