Hall effect
![](/Images/godic/202501/17/Hall_Effect_Measurement_Setup_for_Electrons1726.png")
![Hall effect current sensor with internal integrated circuit amplifier. 8 mm opening. Zero current output voltage is midway between the supply voltages that maintain a 4 to 8 Volt differential. Non-zero current response is proportional to the voltage supplied and is linear to 60 amperes for this particular (25 A) device.](/Images/godic/202501/17/HallEffCurrentSense1727.jpg")
![Diagram of Hall effect current transducer integrated into ferrite ring.](/Images/godic/202501/17/RAZC-GENARRv11727.jpg")
![Multiple 'turns' and corresponding transfer function.](/Images/godic/202501/17/Ampere-Turnsv11727.jpg")
The Hall effect is the production of a voltage difference (the Hall voltage) across an electrical conductor, transverse to an electric current in the conductor and a magnetic field perpendicular to the current. It was discovered by Edwin Hall in 1879.