Best option for sensing PVC Pipes

[mmarinr]

I need to know what kind of limit switch would fit my application. I need to sense whenever a pipe comes to a transference station, so that a mechanism move the pipe. The pipe is 4' (diameter) and 500lbs approx.

Any help?

 

[Tom Jenkins]

How about a photo switch?

 

[WireGuy1950]

All the usual suspects, mechanical limit switch, capacitive switch, photo switch, load cell...