The BEI Sensors/Sensata part 01039-2263 is a high-quality incremental rotary encoder with a 2.0" diameter. This encoder is designed to accurately measure rotational speed, position, and direction in various industrial applications. It features reliable and precise signal output, making it suitable for demanding environments. The compact and durable design ensures long-lasting performance and easy installation. With its advanced technology, this encoder is ideal for applications that require accurate motion control and monitoring.