The BEI Sensors/Sensata part 01002-7811 is an incremental rotary encoder with a 2.5" diameter. It belongs to the Express-H25 series and is designed to deliver precise position information for various industrial applications. This high-performance encoder features reliable and durable construction that ensures accurate measurements in harsh environments. With its compact size, it can be easily integrated into existing systems. The BEI Sensors/Sensata part 01002-7811 is a reliable choice for applications that require efficient and accurate rotary position sensing.