The OH49E Hall circuit consists of a regulator,a Hall generator,a amplifier and an emitter follower.The input is magnetic induction and the output is proportional to the input.The output (B = 0 ) is half the supply voltage.When the S magnetic appears on the Hall marking , output is ;the N magnetic will drive the output ;the instantaneous and proportional output levels determine the magnetic density of the most sensitive of the device.Increasing the supply increases sensitivity. Size:1.3x0.4cm/0.51x0.16inch Package Includes: 10x OH49E Hall Effect 10x OH49E Hall Effect