Water level detection with MPX2050

Mr HG

New Member

• Dec 26, 2013

• #1

Hello,

I am Houssem, a teacher in a university from Tunisia. I

Can I use MPX2050 pressure sensor to mesure the water level in a tank (up to 10L) with a STM32 microcontroller ?

Can you please give me a circuit wich the MPX is connected to amplify the output?

thank you

 

Mr HG

New Member

• Dec 26, 2013

• #2

I will use the rapidSTM32 and I have the pressure sensor PMX2050DP

with regards.

 

alec_t

Well-Known Member

Most Helpful Member

• Dec 26, 2013

• #3

Typical sensitivity of the '2050 is only 0.8mV per kPa according to the datasheet. That equates to ~8mV per metre of water depth by my reckoning. IMO you'd need a good instrumentation amp to get a suitable signal for input to the micro.

 

Mr HG

New Member

• Dec 26, 2013

• #4

Thank you "alec_t"

So can you purpose an instrument amplifier for this application ?? I have seen the INA111 but can I replace it by the TL074 and I sae the same configuration ??

 

alec_t

Well-Known Member

Most Helpful Member

• Dec 27, 2013

• #5

Search for 'instrumentation amplifier' on any major distributor's web-site. The 1NA111 is an example. The TL074 has a different configuration.