swimcoach:
I would like to design a device that will measure pool water temperature, pH, and chlorine level air quality of our indoor pools (temperature, humidity, purification)
The hardest part would be identifying electronic sensors capable of measuring those value and then designing a way to interface them to an Arduino.
But faced with this requirement, my main worry would be why is it necessary, and if there is a need for it then what liability would I be taking on by being responsible for the equipment that provided it?