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Water Tank Depth Sensor problem...

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Houssem85

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I have designed an amplification circuit for amplifying the signal received by the pressure sensor signal MPX2010DP.

Given that the output voltage must be between 0 and 3.3V and the oltage in the input is between 0 and 6mV, is that I can use this circuit?

You find this circuit in this attachment: https://obrazki.elektroda.pl/8177014400_1390049706.jpg

Thank you
 

is that I can use this circuit?
Click to expand...
Basically yes. You'll probably want to use a single supply capable OP with lower offset voltage than LM324.

To be able to always adjust the output zero, the second OP stage must have > 1 gain. I also think that you should use well calculated fixed instead of variable gain with a calibrated pressure sensor.
 
You have not described how that sensor will be physically connected in the tank. Remember that it is a differential pressure gauge. I believe P1 must be > than P2. Presumably, P2 will be connected to a known pressure, such as the atmosphere. That may be a given in your case. If so, I apologize, but there was another post in the past week where that factor was not considered.

John
 
better use a pressure sensor with the "AP" suffix instead of "DP"
they are already amplified, calibrated, and the output is from 0 to 5v linear...
just my 2 cts
 
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