http://usfirst.org/roboticsprograms/....aspx?id=18530
This page contains, among other things, links to the datasheets for a lot of the KOP items. I believe the sensors your referring to are the "Rockwell Automation Line Sensors":
http://www.ab.com/sensors/photoelect...eral/42ef.html
The links on the right side of the page to the catalog and installation PDF's are probably the most help... although I don't know the specific part we got in the KoP, and the checklist doesn't have a part number! Without those, I can't give too much useful information... although your questions are exactly those I know my students will be asking me!