The Allen Bradley 844D-B8CT4CK is a hollow shaft incremental encoder designed for precise motion feedback applications. Part of the 844D series, this model features a rear, through-shaft mounting with a 1-inch hollow shaft diameter, making it suitable for a variety of industrial setups. It includes a tether connection and a 3/8-inch bolt for secure attachment to shaft diameters ranging from 2.5 to 4.0 inches. Operating on an input voltage between 8 and 26 V DC, it provides a 5 V DC differential line driver output compatible with the 3487 standard. With 360 pulses generated per revolution, this encoder delivers reliable and accurate position tracking. Distributed by BSP Automation, this unit is a solid choice for applications requiring dependable incremental feedback in a compact form.