Digikey part # QRB1114-ND
http://www.fairchildsemi.com/ds/QR/QRB1114.pdf=20

Not sure if the distance on that one will work for you.

>>> eross@CHEMSTATION.COM 03/28/02 02:57PM >>>
A simple reflective system using an LED, Photo resistor, and a comparator =
should work for this.=20

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