Model Number QN18VN6LV -
http://www.bannerengineering.com/pro...lectrics/qs18/.
For the edubot you could use 2 9volt batteries in series. Radio Shack sells battery clips, you will tie the red on one battery to the black on the other, and use the free red and black as the power to the sensor.
The output acts like a regular switch, so its either open or grounded. There is an output for Normally Open (NO) and one for Normally Closed (NC). They are the inverse of one another. The output will read as follows within the robot controller:
NO: No reflection = 1, Reflection = 0
NC: No reflection = 0, Reflection = 1
You can adust the threshold using the little switch on the casing. Power it up and play around with it to see how it works. The LED will light up when it sees a reflection, so you can test it without the robot. The spec sheets say it has a range of 6m when you're using reflective tape.