Sensata - BEI Sensors 01070-393 Optical Incremental Encoder, 5-28Vin/out, 1024 Cycles/turn, IP65, 1" Shaft Overview HS35 Incremental Optical Encoder The HS35 Series combines the rugged, heavy-duty features usually associated with shafted encoders into a hollow shaft style. The HS35 accommodates shafts up to 1" in diameter. With optional insulating inserts, it can be mounted on smaller diam..