BEI H20DB-25-SS-200-AB-3904-SM14-24V Incremental Optical Encoder

BEI SENSORS' H20DB-25-SS-200-AB-24V Incremental Optical Encoder is part of BEI's rugged H20DB family, delivering A and B quadrature signals at 200 pulses per revolution for precise position and speed sensing in industrial automation. The 25-SS designation signals a 25 mm family variant with SM14 shaft compatibility, designed to accommodate shaft diameters in the 1/4" to 3/8" range (and metric versions), making it compatible with common motor and gearbox interfaces. It operates from a 24 V DC supply and uses BEI's reliable incremental optical sensing technology to produce clean quadrature outputs suitable for servo feedback, motor control, conveyors, robotics, and CNC equipment. The SM14 end-mount option refers to the shaft/connector arrangement that simplifies installation in chassis- or panel-mounted applications, while the H20DB line supports enclosure options that, when ordered with a shaft seal and appropriate connectors, achieve NEMA 4 / 13 (IP66) protection for challenging environments. This model’s 200 PPR rating provides fine resolution for reliable speed and position monitoring, and its robust construction aligns with BEI’s long‑standing emphasis on rugged, industrial encoders.