What switch can be pressed from both directions?

[yonisav]

Sure thing

To lift the totes up and down we have a system that goes up and down.

To regulate it's hight, we want to create "levels". a level for the height of 0 totes, a level for the height 1 tote and so on.

To know what level we are on we want to use a boolean sensor, that is pressed by the moving system. (we tried a sonar but it wasn't robust enough)

What I am searching for is that boolean sensor