Motion Sensors (MSI) Hall Effect (HE) sensors are true zero speed sensing devices that utilize a special solid state transducer chip that produces an output voltage when subjected to magnetic field changes. Hall Effect transducers are produced in many different sensitivities, configurations and output types; analog or digital. MSI standard HE sensors fall into two general categories; oriented - requires orientation to the direction of travel of the target and non-oriented – which does not, but generally has poorer performance when used with finer pitch targets. Standard series are Oriented: H HD and Non-oriented: HN.
Hall Effect sensors have limitations; "drag" when used with internal magnetics (zero-drag designs are possible employing external magnetic excitation), limited maximum sensing distance (compared to other technologies such as RF and maximum operating temperature compared to variable reluctance (VR).