Any suggestions on the best way to determine the position of a ball valve? I'd like to use the existing valve which is similar to:
Can I mount something on the handle that would still allow it to be used in the normal fashion? I could live with a binary response (fully closed vs not fully closed), preferred would be 3 levels: Fully closed, fully open, somewhere in between. The valve would still be operated by hand, I just need to know the status of the valve elsewhere (e.g. if the engine is operating while this valve is closed, give a warning signal to the operator).
Suggestions on an inexpensive sensor I could use to send a signal to the Arduino?