I want to add water level sensors to three tanks I have. The longest distance away is about 200ft. I was wanting to know what is the best way to do this, and what cable to purchase for the job.
Do I keep the arduino in the house and then run two wires to the tank level sensor (which I have no idea on what it will be yet) or do I put the arduino at the tank then run a generated signal from it back to another arduino back in the house.
How long a line can I take a reading off of a sensor from? What type of cable would I need? Ethernet cable like cat5e or cat6, or just any old pair of wires, or shielded wire like used with servos and steppers or what?
For the sensor end, I am thinking of using a length of pvc pipe that has a float that is attached to a string that is then wrapped around a wheel and encoder or sensor etc. That is one idea. I see you can do it other ways too.
So I just want to find out what cable to purchase to run through the conduit that I have already layed in the ground.