Hello Arduino Folks!
I'm at the outset of thinking about building a submersible pressure transducer for the purpose of monitoring water levels in wells, behind weirs, in flumes, in tanks, etc. I will probably model the sensor after the design in some USGS reports:
A couple of questions:
- are there alternate designs out there that already include interface with an Arduino and a datalogger? ...haven't encountered anything, but if there's something I'd love to here about it.
- any experience working with long signal wires that only carry mV output? ... perhaps I need to think about amplifying the signal. At least one application could be in a "noisy" environment at an industrial site. With that in mind, what are the pros/cons of using an integrated transducer that has a 0-5 V output vs wiring up my own signal amplifier?
- I have the arduino uno w/ 0-5 V output, but some of the freescale pressure transducer spec sheets I've looked at have an excitation voltage more akin to a 9V battery. What are my options for providing a nice stable excitation voltage to the transducer?
As background, I have a soil science background with only beginner/desktop-level electronics experience. I have the Arduino Uno and recently spent a day in an intro class put on by a hobbyist electronics vendor (SparkFun).