BUY A3120 DIP-8 https://www.utsource.net/itm/p/11582245.html

The A3120 is a Hall-effect switch IC manufactured by Allegro MicroSystems. It is a monolithic integrated circuit designed to respond to a magnetic field. It is available in a DIP-8 package and is designed to operate from a single supply of 4.5 V to 24 V. Features: * Low-power operation * High sensitivity * Wide operating temperature range (-40°C to +150°C) * Low-voltage operation * TTL/CMOS compatible output Applications: * Proximity sensing * Position sensing * Speed sensing * Current sensing * Magnetic field sensing (For reference only)