The 01002-2021 is a 2.5-inch solid shaft incremental encoder from the H25 family, designed for industrial and hazardous location applications. It features EMI shielding, high-precision ball bearings, and matched thermal coefficients on critical components to ensure reliable operation in electrically noisy automation environments. The encoder offers wide operating temperature range capability, ruggedized sealing for long-life operation, and industry-standard connector interfaces (M18, M16, M12 options) with extensive electrical protection against miswiring. It meets IP65 protection rating, upgradeable to IP66 when ordered with shaft seal, and is available with certifications for intrinsically safe or non-incendive hazardous locations (UL/ATEX/IECEx). Standard resolutions range from 1 to 2500 ppr, with output options including Line Driver or NPN Open Collector types, and channel configurations such as ABZ (dual quadrature with index) or complementary outputs.