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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kk raikut take your time but plzz raikut try to make that fast because i had to make this project before 5th of dec ..i have a exibition so i have submit this..and once again thank u very much for giving me your precious time....
Hi I am really impressed by your home made water level indicator with alarm. I am only worried about electricity leakage if by any chance .Also whether you will make one for me as I will pay for the cost and labour involved. I am requesting you because I have little knowledge of the circuit and assembling the required components. Moreover I am a senior citizen and am not able to assemble the devise. Kindly reply . Thanks.
raikut (author)   A K Sharma1 month ago
I would be really very grateful if only i could have helped. If i would have been there in India, i would have definately made one for you, but now i am abroad in Dubai as i am working here.
I would have also been pleased to make you one for yourself. But here in Dubai m always busy with work and moreover its hard to get spares here. Anyways thanks for your interest in my Project.
raikut (author)  aditya swaroop2 years ago
Well I am very Sorry! The Circuit Diagram that i had given was wrong. Now i have rectified the schematics and now you can check it and wire it again. Actually the Sensor wire would go to the base and the Collector would get the negative Voltage. 

Please check the diagram above and you can see the transistor testing video and the picture here that i have posted
onlynb5 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 onlynb5 months ago
Hm I also have same issue , what I do is cleanup wires every month :(

Hi,

Have you tried anti-corrosive(AC) materials like AC paint or AC powder which are available in market. I am also planning to make one for my home.

depauw1 month ago

Hello,

This seems te be exactly what i need, but for me it has to work the other way around.

I like to ge signal when the water in my tank is running low, and not when it reaches a high level. Is this possible?

Note that I'm not a genius in electricity, I'm a Pharmacist :-)

Kind regards

SAMN32 months ago

Hi Raikut

So I don't know if I would get a reply for this comment but its worth a try

Great article and am gonna incorporate it in my house....but am a bit confused when reading the instructions and comments upon what all materials are needed..... to start with I made a list of required material.....Can anyone confirm the list.......

srikarb2 months 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

sbiswal5 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 :(
onlynb5 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.

karan367685 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
aniripgnit6 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

ananrafs17 months ago

can i use a 9v Battery for power supply ?

ananrafs17 months ago

can i use a 9v Battery for power supply ?

mcsk8rg8 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 :)
mcsk8rg8 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
mcsk8rg8 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
mshakoor8 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.....
mshakoor8 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.....
mshakoor9 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.....
mcsk8rg9 months ago
What is the purpose of those resistors ?
mcsk8rg9 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 ?
asif67109 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

asif67109 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

asif67109 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

asif67109 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

sheetaltg9 months ago

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

sheetaltg10 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.

sheetaltg10 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 Phull1 year 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
styker171 year 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.
mownika1 year ago
capacitor values in power supply??? plzz
raikut (author)  mownika1 year 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.. :)
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