Noun
English Wikipedia has an article on:fluxgate compassWikipedia
fluxgate (plural fluxgates)
(physics) Any of several devices that use soft iron cores surrounded by coils of wire that generate a pattern of induced currents when it moves relative to an external magnetic field.
Two different magnetometers were mounted: a vector helium magnetometer and a fluxgate magnetometer. Source: Internet
Increasingly, electronic fluxgate compasses are used on smaller vessels. Source: Internet