The Hall Effect Gauss / Tesla Meter

Magnetic fields are well defined in theory but do not behave so predictably in real life. Often the root cause for the failure of a design involving magnetic

Photo 1. Hall effect devices, or Hall generators, are made by attaching four electrical contacts to a thin square or rectangular plate or film of GaAs or InAs. A ceramic substrate is often used for mechanical support, thermal stability, and wiring nodes. Alternatively, the devices can be wire bonded to a nonmagnetic lead frame and encapsulated in a dielectric material. In this photo, the Hall generator is shown with a pencil point for scale.
fields is the designer's inability to understand how the lines of force, or flux lines, are generated or affected by the surrounding environment. In the centimeter-gram-second (CGS) system of measurement, one flux line is called a maxwell (Mx). In the more commonly used SI (international system), the weber (Wb) is 108 lines