The OH49E linear Hall circuit consists of a voltage regulator,a Hall voltage generator,a linear amplifier and an emitter follower.The input is magnetic induction and the output is proportional to the input.The quiescent output voltage (B = 0 GS) is half the supply voltage.When the S magnetic pole appears on the Hall sensor marking surface,the drive output is above zero level;the N magnetic pole will drive the output below zero level;the instantaneous and proportional output voltage levels determine the magnetic flux density of the most sensitive surface of the device.Increasing the supply voltage increases sensitivity. Size:1.3x0.4cm/0.51x0.16inch Note: Please allow 1-3mm error due to manual measurement.pls make sure you do not mind before you bid. Due to the difference between different monitors,the picture may not reflect the actual color of the item.Thank you Package Includes: 10x OH49E Hall Effect Sensor