Used Dynapar Encoder.  Series X25.  # X25-1024-0-3-4.  Explosion Proof, Shielded Bearings with Shaft Seal.  1024 PPR.  3/8" Shaft.  Output:  differential, with index, Format C.  Electrical:  5-26V in;  5-26V Line Driver out.  Cast Aluminum Housing.  1/2" Conduit Entry.  Unit is in used but good condition.