Something like a mercury switch could work for this project. Having a switch on each side of the level feeding an AND gate would produce a level result. You could then extend the level horizontally and place the switches appropriately to set the sensitivity. I imagine this working very similar to a classic bubble level. You could also make due with one mercury switch as liquids will always drain to level.

 

We have no idea of even the scale of the device. The solution space changes radically when the scale changes from 1cm to 1km. There is no point to proposing solutions until we know more.

Bob

 

21 posts and nothing new from the TS . . . .

Questions for the TS:

What is your definition of "level"? IOW what is the maximum allowed height error between the two balls? 1/8"? 1/16th"? 1 mm? 0.001"?

Or, expressed as a line between the centers of the two balls, 1 degree? 1/10th degree? 1 minute of arc?

Can the position sensors touch or be attached to either or both of the balls?

ak