[dtengineering]

We've had very good luck with a wide range of Sharp IR sensors.

Just make sure that if you are planning to use them this year for detecting any parts of the rack that you test them using diamond plate. We found that the diamond plate was so reflective that if we were at anything other than exactly 90 degrees to the plate that the IR would simply bounce off... and not return to the sensor.

We're thinking sonar is the answer for detecting diamond plate, but will use the IR for monitoring the height of our lift.

Jason