The KMZ49 is a sensitive magnetic field sensor, employing the magnetoresistive effect of thin-film permalloy. The sensor contains two galvanic separated Wheatstone bridges, at a relative angle of 45° to each other.
A rotating magnetic field in the x-y plane will produce two independent sinusoidal output signals, one a function of +cos(2α) and the second a function of +sin(2α), α being the angle between sensor and field direction. The KMZ49 is suited to high precision angle measurement applications under low field conditions (saturation field strength 25 kA/m).
The sensor can be operated at any frequency between 0 Hz and 1 MHz.