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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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Use aluminum foil (2 pcs) glued to a plastic backing as an electrode plate. will weather far longer than just wires.

SaadiM7 days ago

hey guys could someone explaine the circuit analysis

kcrajiv16 days ago

I have doubt whether this will have electric leakage in water tank leading to shockage. Kindly clear my doubt

onlynb9 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 onlynb9 months ago
Hm I also have same issue , what I do is cleanup wires every month :(
AdithyaN1 sbiswal5 months ago

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.

This can cured by using a float that is sealed and designed to be in water. It acts as a switch. I have two 2500 gallon water tanks with 5 floats attached to it. No problems and works flawlessly. Electronics submerged in water will only last for so long due to electrolysis, the same phenomenon on outboard motors which is why they have zinc plate that is softer than the metal for the motor. So it eats away slowly at that instead. Email if you want help.

onlynb JasonS1127 days ago

can you pls send pic of tht switch?? or its web link.

Nice one. However, one problem with such circuits is the corrosion of electrodes due to the high current. I've been using this water level indicator circuit for several years and hardly needs cleaning. Maybe its the low current needed to trigger the CMOS IC switch.

Which diode will i use as the full wave. Rectifier
Which diode will i use as the full wave. Rectifier

can some one let me know the parts used

Hello Mr.Raikut i have chosen your project and i want to have some modifications in it. I want to have a motor controlled circuit so that when the level reaches to the last point the motor switches off by itself. Can you help me with that ???? Waiting for your suggestions in this regard

Tutancof2 months ago

If am not wrong your buzzer circuit need additional connection for 555IC pin 4 and 8.

sim amosl2 months ago

hey can i use BC 548 instead of 547?

Tutancof2 months ago

Can i use any kind of 555 ic NE, NA, SA, SE????

denisserhein3 months ago

hi raikut! tnx for the project,..just have few suggestion to make this project more useful,..how about instead of alarm,we make this like start stop motor circuit,..you know,if it reach the water level required,the automatically switch off the motor,..and if it is at low level it automatically switch on,..do u think it will work,..pls help me try this,..

also sorry for my "english",..

There are many ways to do this. A pump is a high draw AC appliance, but with the proper care and design can be accomplished. I use solid state relays a lot with low control voltage. Meaning only a few DC volts can activate an AC replay that can handle 50+amps. Depends on what you are looking to do exactly.

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.
I would like to help you Mr.Sharma. Please do mail me your details to genn.sathish@gmail.com
raikut (author)   A K Sharma5 months 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
Dear Mr.Raikut,

I'm sathish kumar working in an Industrial Automation company which deals in automating factories and process industries. My designation is technical Sales Associate. I do know the way to handle plc, drives, scada etc. Will i get an oppurtunity to work in overseas
depauw6 months 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

Ya it is possible sir/madam. i would like to help u. Can u push me a mail about your details through genn.sathish@gmail.com
denisserhein3 months ago

hi raikut! tnx for the project,..just have few suggestion to make this project more useful,..how about instead of alarm,we make this like start stop motor circuit,..you know,if it reach the water level required,the automatically switch off the motor,..and if it is at low level it automatically switch on,..do u think it will work,..pls help me try this,..

also sorry for my "english",..

denisserhein3 months ago

hi raikut! tnx for the project,..just have few suggestion to make this project more useful,..how about instead of alarm,we make this like start stop motor circuit,..you know,if it reach the water level required,the automatically switch off the motor,..and if it is at low level it automatically switch on,..do u think it will work,..pls help me try this,..

also sorry for my "english",..

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.

Use a MOSFET instead of a BJT transistor. It is a voltage controlled device that can handle amps of current, as opposed to the small current available in a standard BJT.

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
SAMN36 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.......

srikarb7 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

sbiswal9 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 :(
onlynb9 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.

karan367689 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
aniripgnit10 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

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