hi! i've never used one of those sensors, but here http://www.planetarduino.org/?cat=284 i've found that they have a standard SUPPLY-GROUND-OUT pinout configuration, so you just need to connect the power supply to the arduino one or to +5V, the ground to the arduino ground anche the last pin to an arduino analog input, then it's all up to the software. one more thing: you want to use this sensor to make a tone proportional to the distance (like a theremin) or to trigger notes (like the light beams used by kraftwerk in their "radioactivity")? these are both interesting ways to use that sensor.