Water Level Indicator Circuit Using Transistor

May 5, 2019 admin Electronics Projects 0

We generally worry about the wastage of water, when we switch ON the motor and forget to turn it off. The Water Level Indicator employs a simple mechanism to detect and indicate the water level in an overhead tank or any other water container. We have posted already a Water Level Indicator and Controller using IC ULN2003. In this article, we are presenting a very useful, cheap and simple Water Level Indicator circuit using transistors (bc547) for beginners. This circuit indicates the level of water in the water tank using LEDs with transistors. you can use this project as a college project.

Circuit Components

4 – BC547 transistors
3 – 220-ohm resistors
3 – LEDs
1 – Buzzer
5 – 9v battery + battery clip/power supply
some pieces of wire

Circuit Diagram

The connections arrangements are shown in the circuit diagram shown above. The +9V power supply or battery is used. In this circuit, we have used all the transistors as a switch. The water touches the wires’ contact with base of each transistor, a small current flows through the base and turns on the transistor as the transistor turns on, the LED connected to it glows. LEDs will be turned on depending upon the level of water. We have used a buzzer with the last transistor as water touches the base of the last transistor collector the collector and emitter connected and buzzer rings. The relay can be connected instead of the buzzer to auto control the water level in the tank.

Points of BC 547

Resistor 220 Ohm

Applications & Uses Of Water Level Indicator

Water tank level control
Automatically turn ON/OFF water pumps
It is used in factories, commercial complexes, apartments, home,
Fuel tank level indicator
Oil tank level control and indicator
High & low-level alarms
Pool water level control
Leach-ate level control
Cooling tower water level control
Sewage pump level control
Remote monitoring liquid
Pump controller Auto
Stream level monitoring auto

Water Level indicator with auto cut off circuit

In this circuit we have used a relay instead of a buzzer as the tank will become full relay will be changing its state and will cut off the power. We are going to control the water pup with this relay, So you must use a power full relay because low power relay will be damaged as more impairs will cross through it.