This document describes a student project to create a water overflow alarm system. It includes a certificate verifying the student completed the project, an acknowledgment thanking those who provided guidance, and sections on the introduction, materials used, working principle, project images, scope, and bibliography. The system uses plastic bottle caps and electrical components connected to a circuit to detect when water reaches the maximum level and activate an alarm to prevent overflow and wasteful water usage.

1. Physics
Investigatpry project
(2017-18)
Topics:water overflow alarm system
SUBMITTED TO
Mr. SOHAN LAL
(PGT PHYSICS)
SUBMITTED BY
KRITI GUPTA
CLASS XII-‘A’

2. Content
1.Certificate
2.Acknowledgment
3.Introduction
4.Material required
5. working principal
6.Project images
7.Scope
8.Bibliography

3. certificate
This is to certify that Kriti Gupta , a
student of class XII-A has successfully
completed the project titled “water tank
overflow alarm” under the guidance of
Principal Mr.AS Bhati sir and
Mr.Sohan Lal (physics teacher)
sign of external examiner sign of physics teacher
------------------- ---------------
sign of principal

4. -------------------
ACKNOWLEDGEMENT
In the accomplishment of this project successfully, many
people have best owned upon me their blessings and the
heart pledged support, this time I am utilizing to thank all
the people who have been concerned with project.
Primarily I would thank god for being able to complete this
project with success. Then I would like to thank my
principal Mr. A S Bhati sir and physics teacher
Mr. Sohan Lal (physcics teacher) whose valuable guidance has
been the ones that helped me patch this project and make
it full proof success his suggestions and his instructions has
served as the major contributor towards the completion of
the project.
Then I would like to thank my parents and friends who have
helped me with their valuable suggestions and guidance has

5. been helpful in various phases of the completion of the
project.
INTRODUCTION
The Water Level Indicator employs a simple
mechanism to detect and indicate the water level in
an overhead tank or any other water container.
As the water level rises gradually, and reaches its
max level, water completes the circuit and the alarm
busses out.
NEED FOR WATER LEVEL INDICATOR
 To Overcome Overflow Problems
 To Prevent Wastage Of Water

6.  To Prevent Wastage Of Energy
 Attention And Observation
 For Sustainable Use Of Water And Judicious
Use Of Electricity
MATERIALREQUIRED
1. 3 plastic bottle caps
2.used sketch pen
3.small buzzer
4.9 v battery and connector
5.aluminium foil paper
6.resistor 220 ohm
7.led 4 v

7. Working PRINCIPAL
There is a water cap located at the bottom of
the tank which is free to move. As the water
level rises the cap attached with the sponge
rises with the water level. The moment it
reaches the uppermost or the max water level
it get connected with the upper cap which is
connected to the circuit and hence circuit get
completed and the alarm gets buzzed out

8. PROJECTIMAGES
SCOPE
• This circuit not only indicates the amount of
water present in the overhead tank but also
gives an alarm when the tank is full. This
worthy device starts ringing as soon as the
water tank becomes full. It helps to check
overflow and wastage of water by warning
the customer when the tank is about to

9. brim. It also provides automatic control of
pumps at a remote location.
 Now no need to go on the roof to look the
water level.
 Alarm starts ringing as soon as tank
becomes full.
 Suitable for every tank.
BIBLIOGRAPHY
1. NCERT Physics Class 12
2. Together With Lab Manual Physics-XII
3. Wikipedia
4. www.slideshare.com

10. 5. www.google.com
6. www.scribd.com