Taiwan alpha 12mm rotary shaft encoders 20mm flat insulated shaft 24ppr taiwan alpha re120f 40 20f 24p this switched incremental rotary shaft encoder has terminals arranged for vertical mounting the resolution is 24ppr and there are 24 detents per revolution the robust construction and long operating life makes this encoder suitable for applications that require precise shaft unlimited rotation taiwan alpha 12mm vertical encoder 20mm flat insulated shaft 24ppr