It gives audio as well visual alarm whenever the water tank overflows.
Water tank over flow alarm.
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Installing a water tank overflow alarm is easy.
4 8 out of 5 stars 167.
Working of water tank overflow alarm.
Water is a vital but scarce natural resource.
To prevent water wastage this water tank overflow indicator comes in handy.
It is built around two bc547 transistors t1 and t2 and two timer 555 ics ic1 and ic2.
The circuit works same as the water level indicator circuit which is my previous instructable.
1 shows the water tank overflow indicator circuit and fig.
As water is a good conductor of electricity there are two probes or conductors inserted in the tank.
2 shows the power supply circuit.
Simple wireless water tank overflow alarm simple without any microcontroller.
Keep an eye on leaks overflow and temperature changes near your equipment even when you re offsite.
Water tank overflow indicator circuit.
So when water touches the sensor probe then it switches the transistor and the transistor do the same work as it is done in water level indicator circuit it.
As soon as the water level touches both the conductors the circuit is completed and it sounds an alarm.
The circuit can be implemented to fit other applications as well that require liquid level measurement.
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Both ic1 and ic2 are wired in astable multivibrator mode.
Here is a simple water overflow alarm circuit to prevent overflow of water from overhead tanks.
I had simply replace the led with buzzer.