AstroSystems HST-21U Rotary Encoder Transducer

The Astrosystems HST-21U Transducer and Encoder is a resolver‑based position feedback device that provides absolute position data for industrial motion systems, designed for rugged and hazardous environment applications. This four‑bolt mount transducer module weighs about 3.0 lb and is built for straightforward mounting to compatible gear assemblies. It is compatible with any Astrosystems motion controller or programmable encoder, enabling seamless integration with existing Astrosystems hardware, and offers remote electronics options with cable lengths of 10, 25, 50, or 100 feet. Typical applications include food processing, packaging, pick‑and‑place, indexing, winding, and conveyor merge, reflecting the model’s role as an absolute position sensor within automated lines. As the current model in the HST family, the HST‑21U is the active option, with several other HST/X models listed as no longer available.