Littelfuse
Littelfuse is a Chicago-based global electronic components manufacturer best known for circuit protection products, but with a significant and often overlooked magnetic sensing division following its 2016 acquisition of Hamlin Electronics — one of the original manufacturers of reed switches. The company’s magnetic sensing portfolio covers reed switches and reed relays across a comprehensive range of form factors, actuation forces, power ratings, and environmental specifications, along with Hall effect sensors for proximity, speed, and position detection, and magnetic level sensors for fluid level detection in automotive, white goods, and industrial applications. Littelfuse reed switches and sensors serve the automotive, HVAC, medical, smart home, industrial, and consumer electronics markets, and the company’s global manufacturing scale and distribution network through Digi-Key, Mouser, and Farnell make its magnetic sensing products some of the most accessible and widely stocked in the world for design engineers needing reed switches or proximity sensing devices.