GPI Model R112S and R112B optical rotary incremental encoders are for light industrial applications needing high resolution in a small package.
Encoders are 12 mm in diameter and 25-mm long and come in shafted or blind-hollow shaft versions. Resolution is 8,000 cycles/rev, or 32,000 counts/rev.
Gurley Precision Instruments,
514 Fulton St., Troy, NY 12180,