Allen-Bradley 800MR-U20H Rotary Potentiometer is a round, NEMA Type 13 oil-tight potentiometer unit in Rockwell Automation’s 800MR family. 800MR products include both potentiometer units and operator-only variants, designed for rugged industrial environments. Rockwell literature cites the 800MR-N37 as an example catalog entry for this family, and related U-series models exist, such as 800MR-U24H. As a rotary potentiometer, it provides a variable resistance proportional to shaft rotation for use in automation control circuits.
