Need help to design digital level sensor circuit

[Abdurazzaq]

Dear all

I want help how to design digital level sensor circuit

Any suggestions or help will be appreciated

Thank you

 

[scanman]

Hi,
Do you mean actual level of a digital signal or a process level like amount of water in a tank?

 

[Abdurazzaq]

Thank you for reply
process level

 

[scanman]

This depends on the type of measurement:
Liquid level
Pressure
Temperature
?
Are the measurements in discreet steps like upper limit / lower limit
or
Defined range like 0 - 100Kpa or 0 -10cm Hg with infinite number of steps (analog) or 2n steps (digital) ?

 

[Abdurazzaq]

Liquid level
thx

 

[scanman]

Here is a simple capacitance type:

http://www.discovercircuits.com/PDF-FILES/capgage.pdf

 

[nikhil_jain]

check these liquid level circuits for some idea:

**broken link removed**
Liquid level alarm

 

[pranam77]

Here is a Microcontroller based water level controller which monitors the OHT as well the sump tank, with HI-Low voltage protections for the motor and all vital functions displayed on the LCD. Complete project with description, PCB layout and codes.
Micro_Water_Level_Controller.rar
**broken link removed**

 

[GrandAlf]

There are liquid pressure sensors available that give industry standard 4-20ma output. Probably the best long term reliability, they would require calibrating to compensate for the shape of the tank, probably a lookup table if irregular size.

 

[JohnRocks]

Hi dears,
Which one do you want to design??
Ultrasonic
Liquid level sensor…?
Flow
Temperature
Pressure…
Ultrasonic is of low cost with high performance you would like to. The liquid sensor has a compact and solid state design. You will need the LR series for measurement purposes and all the stainless steel and pushbutton setup.
Thanks

 

[prady019]

Hi
Designing digital-cricket with micro-controller is much more easier then in any suggestion u can get.