Bourns em14 series 14mm rotary incremental optical encoders bourns em14a0d c24 l032n a 32ppr incremental optical rotary encoder that is hcmos cmos and ttl compatible a compact design and high rotational life cycle makes this sensor ideal for a range of applications especially humanmachine interface applications hmi bourns em14a0d c24 l032n rotary optical encoder 32ppr