Pressure sensor PCB

This is part of what will be the shed sensor system, for my home monitoring project.  This board uses a differential air pressure sensor (Freescale’s MPX2050DP) to measure the water pressure above atmospheric.  There are other non-contact ways to do this – namely ultrasonic, but lets try this for now. I expect the environment will be fairly corrosive for an ultrasonic sensor, so this should be a good choice.

pressurePcbFrontThumbCircuit uses a instrumentation amplifier – i.e. four LM324D op-amps to raise the output voltage from 0-40mv to a 0-12v range (I think).

water-tank-depth-sensor-schematic

 

 

The circuit is from Here. A very interesting implementation of this is Here

PCB designed & ordered, so time will tell.

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