Microcontroller based system to measure and display level of the liquid

[mthongobese]

Hi there can you please suggest the type of transducer I should use for my design project that is to measure and display level of the liquid in a stationery tank. except for the float method, I need other methods

 

[mthongobese]

Hi there can you please suggest the type of transducer I should use for my design project that is to measure and display level of the liquid in a stationery tank. except for the float method, I need other methods that will be efficient enough and simple enough

 

[ericgibbs]

hi,

Do a search for 'ultrasonic level' on the forum, lots of posts.

EricG

 

[mvadu]

You can use ultrasonic waves to do the job. But i am not sure about the simplicity, diffinetly efficient enough

 

[gramo]

what about using 2 sheets of metal and using the liquid as a dielectric, then with an external circuit you could measure its capacitance

 

[mthongobese]

Level measurement

Please If I can get a block diagram and the ciruit layout of the ultrasonic level measurement maybe it will be easy but for now I am lost

 

[aibelectronics]

You can use a 555-timer, configured in astable, running at ultrasonic frequency (>20KHz) feeding your mic as the transmitter. Another mic acts as the receiver and collects the rebound from the bottom of the tank (or whatever). Receiver and transmitter should be in the same module. The micro calculates the time lag between the send and receive times which it converts as a measure of volume.
Why don't you like the float, mthongobese?

 

[j.p.bill]

What kind of resolution do you need? How big is the tank?

 

[jbeng]

Another common way to measure tank levels in an industrial setting is to measure the pressure (referenced to atmospheric pressure) that the liquid exerts on a transducer at the bottom of the tank. The pressure reading should be proportional to the tank level if the tank is cylindrical and standing on end. This is also the case if the tank is square or rectangular. If the tank is irregular in shape or a cylinder on it's side, the readings won't be linear. If the tank is pressurized, a differential pressure reading is used, where one side of the transducer is exposed to the liquid pressure (measurement) and the other side is exposed to the gas pressure in the top of the tank (reference). The shape of the tank stuff still applies regarding linearity.
JB

*edit* I forgot to mention that anything like this that is "industrial" is not likely to be inexpensive.

 

[nards]

Pic16f84a

HELO my brothers and sisters...pls help me about my project..i need pic16f84 connected the water level sensor and timer.

 

[nards]

than...i need your suport! tnx

 

[mthongobese]

I have chosen the float connected to the potentiometer, please if u would suggest some additional components for my design to be more efficient, for now for level above 80% I have an alarm, pls help!!!!!!!!!

 

[AllVol]

if u would suggest some additional components for my design!

Please show us, either by circuit, block diagram or flow chart, exactly what you have done so far so we do not waste time duplicating your already thorough efforts.