Allen-Bradley 870-N20 Switch

Allen-Bradley 870-N20 is a Series C sensing head in the 870 family from Allen-Bradley (Rockwell Automation). The model refers to a specific sensing head variant within the Series C lineup, a compact device designed to be used as the sensing element in compatible Allen-Bradley switch assemblies. The 870-N20 appears in distributor catalogs as 870-N20, reflecting its place in the 870-series family and its role as a sensing head within the modular sensing solutions offered under the Allen-Bradley brand. As a sensing head, it provides the core sensing function in automation equipment and is intended to be paired with compatible actuators and housing components that complete a sensing switch assembly. In practical terms, the 870-N20 helps detect the position or presence of a moving part within a machine, feeding a signal to the control system to drive logic or interlocks through the associated switching hardware. The Series C designation identifies this particular family within the 870 lineup, guiding engineers to confirm dimensional fit, mechanical interface, and electrical connections when selecting replacement components or planning module upgrades. With its heritage in Allen-Bradley sensing solutions, the 870-N20 remains a recognizable option for projects that rely on interchangeable, modular sensing heads within established 870-series configurations.