Allen-Bradley 800MR-N37 Potentiometer Operator

Allen-Bradley 800MR-N37 Potentiometer Operator is an operator-only rotary control in the 800MR family, designed to accompany a removable resistive element to form a complete potentiometer assembly. It is intended for devices that use a 3/8" mounting bushing and a 1/4" shaft, and it fits 22.5 mm panel cutouts, giving a compact but rugged control suitable for tight spaces in industrial panels. This is a single-turn rotary operator with a graduated marking ring that helps set precise adjustments when paired with a 400 kΩ potentiometer; the resistive element itself is not included in the 800MR-N37. The enclosure features oil-tight (NEMA 13) protection to resist dust and moisture, which is important in harsh environments commonly found on manufacturing floors and packaging lines. Sold as the operator only, this part is used to provide a durable, tactile control interface in Rockwell Automation control panels, instrumentation enclosures, and other equipment where a robust knob-based potentiometer adjustment is required without integrating the resistive element.