warer level sensing - what sensors to use?

There's a new project I will work on, it's water level sensing from the residential water tank.

I want to output a percentage of available water, then do other stuff according to it. I will take care of everything else, the only thing I don't know about is what sensor to use?

the volume of the tank is 2m^3 (length=2m,width=1m,height=1m). so when I put a distance sensor to measure the height and say it's 40cm of water, this means 40% full and 60% empty, right? that's what I plan to do.

I want a cheap sensor (solution), about 30$ or so if possible (it's a simple residential device... if it's 50$, ok. but not more ^_^).

The device I'm gonna make will have more functions to do, but they depend on what current water level is.

Thanks for help.

Use magnetic Float Switch or Tilt switch.

like what part exactly? what do I need with it?

Magnetic float switch polymer type vertical or horizontal. Switch rating will be 12V few mA. When switch is closed or opened depending upon NO or NC type uC pin should sense high or low and take action.

http://www.nutronicsindia.com/sensors/float-switches.html

**broken link removed**

you could use the Float Sensor, which is used to sense the level of the water.

anboli said:

you could use the Float Sensor, which is used to sense the level of the water.

Click to expand...

for a 1m height tank, what float sensor do you recommend? what about it's price?

How can I measure it's readings using a microcontroller (5v, or more?)?

you could refer this page..

https://www.apgsensors.com/products/liquid-level-sensors/ultrasonic


sensor output gives in mA range output, you need to calibrate in Voltage for you analog reading.....

then only you could detect the level of the water...

- - - Updated - - -

https://www.edaboard.com/threads/288295/#post1233032

see this sensor also...

For a 1 mtr tank depth just use Vertical or horizontal magnetic float switch. The price is around $3 for i switch (Indian Price). Be sure to check type of contact. They come in NC and NO types. To sense low level use NC type (so that when level is low it awitches ON) and for high level NO type (when high level it switches ON).

jayanth.devarayanadurga said:

For a 1 mtr tank depth just use Vertical or horizontal magnetic float switch. The price is around $3 for i switch (Indian Price). Be sure to check type of contact. They come in NC and NO types. To sense low level use NC type (so that when level is low it awitches ON) and for high level NO type (when high level it switches ON).

Click to expand...

well, I ran this parametric search: https://www.digikey.com/product-sea.../1966532?ColumnSort=1000011&fid=0&pageSize=25

the minimum price is about 13$. can you give me a particular part name or something similar?