Instructables
Picture of Water Level Indicator with Alarm
Introduction
Today I am going to talk about a very useful project that I had taken up. It is called the Water Level Indicator. Nowadays everybody has overhead tank at their homes. But everyone who has a water tank above knows the kind of problems that they face. Firstly there is no system to track the water in the tank. Then there come a secondary problem that is when their water pump is started they have no idea when it gets filled up and sometimes there are situation where the pump keeps on pumping water to the tank and the water starts spilling out from the tank. There is wastage of energy as well as wastage of water.

Later History
This project that i had taken up is the result of  long hours of research of work at the Internet as well as long hours of thinking. I had made various versions of the projects earlier but at last i came up with this final product. I bet this has been tested and i can now firmly say that the model would work flawlessly without any complains for years. I am saying this as i have installed this models to various houses in my neighborhood and all are working fine without any maintenance. And indeed this model is admired by all who uses it.

The Situation 
The house where I live in has an overhead tank which is about 30 feet from the ground level. I was getting bored going up the rooftop to check whether the tank has filled or the water level was below to start the pump. I had to do this again and again. Then I sought for a solution. I always used to think of the possibilities of how can this problem be tackled in an electronic way. After years of research and by trial and error,  I found one and wanted to put whatever I have done out here so that it may be helpful to someone who has a overhead water tank at their homes.


 
 
 
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srikarb10 days ago

Can i use just 4 levels instead of 7 ? if yes then do i need to change the transformer ?

u can use no need to change transformer

onlynb2 months ago

thanks raikut for this project.. ive made every exactly you have written but the sensors in overhead tank gets corroded in just two weeks . after that the buzzer sound gets low and some LED's start flickering. pls telll m some solution on this.

sbiswal onlynb2 months ago
Hm I also have same issue , what I do is cleanup wires every month :(
sbiswal2 months ago
Hmm I've also using this kind of project but the problem is that we have to put really long wires and not just 2 or 3 its up to 8-10 wires for censors , I'm thinking about wireless but have no idea about that :(
onlynb2 months ago

thanks raikut for this project.. ive made every exactly you have written but the sensors in overhead tank gets corroded in just two weeks . after that the buzzer sound gets low and some LED's start flickering. pls telll m some solution on this.

karan367683 months ago
can I remove the transformer and install the battery...what voltage of battery should I use if I decrease the sensor 7 to 5.
Please tell me
aniripgnit3 months ago

is there any chance to body or short circuited of the metal pipes and water as well in this circuitry ...?please help

Could you help me make this please? I really suck at making stuff :D Any help will be appreciated

ananrafs14 months ago

can i use a 9v Battery for power supply ?

ananrafs14 months ago

can i use a 9v Battery for power supply ?

mcsk8rg5 months ago
N I made mine without the resistors :D
I used bc 547

a normal led can take upto 3 volts with ease
If exceeded it will burn eventually

try experimenting n make the world a better place with your ideas :)
mcsk8rg5 months ago
N water In different regions has diff amount of conductivity
N
Have diff rate of corrosion ability
My indicator got corroded in a couple of weeks
mcsk8rg5 months ago
Try running the buzzer n led directly through appropriate amount of voltage which won't burn them
That will tell if they are working independently or not

If they are working
Then the electrodes in the sensor are probably corroded
Or
Connections circuit error
mshakoor6 months ago
Hi buddy where we give all the ground.....u text in rps...but what u give circuit and explanation there is no rps u r using.....
mshakoor6 months ago
Hi buddy where we give all the ground.....u text in rps...but what u give circuit and explanation there is no rps u r using.....
mshakoor6 months ago
Can u pls mail me the circuit diagram with proper specification...my mail id is -mdkhurram786@gmail.com
Plz send as early as posible otherwise i lost my 20 marks for external.....
mcsk8rg6 months ago
What is the purpose of those resistors ?
mcsk8rg6 months ago
Doesn't the current effect the water in any way ?
If it does then is it good or bad ?
Is it safe to drink that water ?
Or use for washing ourselves ?
asif67107 months ago

what is the current for this circuit? it operates on 5v but what are the Amperes (Current) required for proper working of this circuit? plz reply soon. my email sethi787@gmail.com

asif67107 months ago

what is the current for this circuit? it operates on 5v but what are the Amperes (Current) required for proper working of this circuit? plz reply soon. my email sethi787@gmail.com

asif67107 months ago

what is the current for this circuit? it operates on 5v but what are the Amperes (Current) required for proper working of this circuit? plz reply soon. my email sethi787@gmail.com

asif67107 months ago

what is the current for this circuit? it operates on 5v but what are the Amperes (Current) required for proper working of this circuit? plz reply soon. my email sethi787@gmail.com

sheetaltg7 months ago

will this circuit withstand if i give 12v power supply from an adaptor ?

sheetaltg7 months ago

Can i use 9V Battery instead ? or any adaptor of 5volts 1Amps or 5volts 1.2Amps or please specify the ratings of the adaptor that i can use for the Power supply section.

sheetaltg7 months ago

Thanks a lot for the circuit. Its working fine but the Blue LED is dim and the buzzer voice is low. Can you please tell me the exact number of alternate Transistor ( Darlington NPN Transistor as mentioned by Adarsh_tronix ) that can drive both the Blue LED and Buzzer.

hey raikut.....i made this project but the blue LED and Buzzer doesn't work.........please help................................urgent.......
To fix that you might want to use a darlington NPN transistor than a BC 547 which will provide more current for the blue led and the buzzer.Your problem arose because the BC 547 transistor can handle a max. current of 100 mA only which is not sufficient for both the Led and the buzzer.
raikut (author)  Gurpartap Singh Phull11 months ago
If it is not working try to use a green LED instead as blue LED consumes more current and it may be preventing the buzzer from triggering
styker1711 months ago
Is the symbol for the transistor correctly put? I am a newbie but I thought it should be pointing to the ground. I want to use the circuit for our school project. I am really confused about the transistor. Please help.
mownika11 months ago
capacitor values in power supply??? plzz
raikut (author)  mownika11 months ago
You can find it in the comments section, I have already discussed the issue before
Dear Raikut
Thank for Good write up.. and for now I decided to make one with my non-skill of electronics ..
after i try to understand about diagram and duty/function of it i also googled for more info.

I've only one question the 470k/ohms is connect to Base on one side and Collector in the other side and also connect to negative am I right ...

because when i search about how transistor work there're a ton of information and a lot of way to connect it. They says bias or whatever i'll take a lot of time to re-read it later .. for now i'm just want to make sure that i can read out diagram and not blow the transistor.

sorry i'm not good in English Thank you in advance.. :)
raikut (author)  smokky toppy1 year ago
If you can see the video you will know it
Many thanks for reply sorry that i did not dig the previous reply .. now i have finish this project it very useful ... thanks again
prabhatjkay11 months ago
plz send this crkt pdf to my email direct2kisna87@gmail.com
khaille11 months ago
Hello raikut! thanks for a very good project. If i would like to increase the sensor levels from your 7 levels to our 11 levels (or 22 levels), how would it affect the values of my components? thanks in advance!
raikut (author)  khaille11 months ago
yes you can do this by just adding more transistors to the circuit with the same values along with it and it would walk flawlessly
khaille raikut11 months ago
Hello again Raikut! What are the possible power supply for this project? Would you recommend a mobile phone/celphone charger with the same output values (5V)? Are CAT5 cables suitable to be used underwater? Thank you!
raikut (author)  khaille11 months ago
I would not recommend you to use a mobile phone charger as the ampere of the charger is not sufficient for the transistors to trigger and as there are many LED to be lit, it would be better if you would use a different power supply that i have shown in the figure using a stand alone transformer
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