detects the magnetic field
of any ferrous object even when covered
by ground, pavement, snow or shallow
water. Its two magnetic field sensors
balance out the effect of the earth's
ambient magnetic field. As long as
this balance exists, the frequency
of the audio output signal remains
at 40Hz. However, when the
magnetic field becomes stronger
at sensor A than it is at sensor B,
the output signal increases in
frequency. When the tip of the
locator is positioned directly over the
target the audio signal increases to its highest
frequency.
Price on request
