Yes, so for a given container of constant cross-sectional area, you can say that the pressure is proportional to the weight, but not equal to the weight of water.
amine-11_trisity was correct in post #28, saying that the pressure is given by:
That span is with an excitation of 10 volt.
It is 20mV when powered from 5volt.
That's 20 uV per cm of water.
Hopefully not with common op-amps, like the LM358.
Leo..
Maybe not is more likely.
From the data sheet:
"The absolute sensor is designed for vacuum applied to P1 side."
Why not use the correct sensor?
1 Like
The teacher should have given you these sensors (click).
0-40kPa gauge, and HX710 instrumentation amplifier with 24-bit A/D included.
Leo..
1 Like
i got this sensor (0-40kpa ) from the store today hoping that it will fit my project
is the digital Barometric Air Pressure Sensor Module a good solution !!
If you have the module with the sensor and HX710 chip, then it will work.
The sensor has digital outputs, so use a HX710 (or HX711).
Leo..
yes i have it , do you know how this sensor works!! does it sense the atmospheric pressure!! or it is a gauge!! some people said it is 30kpa to 110kpa span !! unfortunately there is no datasheet for this sensor
It's a gauge sensor, one end open to the atmosphere, exactly what you need.
Last time I used one I used the HX710.h library.
I helped someone making a fuel (depth) sensor in this thread (post 100+).
Pressure difference when dipping the end of the hose in a glass of water worked very well.
Leo..
Yes it is!!
It will work. It has a range of 0 to 40kPa
Then you are all set to go!
Thanks, well then i will work on it today then i will provide a feedback about the overall project
Thank you so much , that post helps me a lot
You will need to install this library
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.