Environmental Monitoring Equipment & Supplies • Sales, Rental & Service by Enviro-Equipment — Charlotte, North Carolina USA

Fisher FX-3 Ferro Magnetic Probe Rental
  • Detects ferromagnetic objects only (iron and steel).
  • Only responds when probe or object is in motion.
  • Designed to locate survey markers, pipes, valves, well casings, septic tanks and more.

This item is no longer available for rent.

The FX-3 FERRO PROBE is a precision state-of-the-art differential induction magnetometer designed to locate survey markers, pipes, valves, well casings, septic tanks and a variety of other ferromagnetic objects. It is also used by relic and treasure hunters to seek out buried objects far beyond the reach of ordinary metal detectors also use it. The FX-3 is similar to other magnetic locators in that it has two sensors, which respond only to the magnetic field of ferromagnetic objects, ignoring all other materials (copper, aluminum, brass, etc.).

It also has three very significant differences:

  1. The FX-3 is a “motion” detector. It responds only when it (or the target) is in motion.
  2. The FX-3 “nulls” over targets. As a target is approached, the output tone increases in volume and pitch then momentarily disappears as it passes over the target.
  3. The FX-3 costs less. Less to manufacture, less to purchase and less to use. Advanced solid state techology combined with Fisher engineering has made possible a one knob, one battery locator so reliable that it’s backed by a 2 year warranty.

Advanced, solid-state technology combined with Fisher engineering has made possible a reliable one knob, one battery locator. Fisher Research Laboratory has been producing rugged, high quality metal detectors longer than any company in the world. The FX-3 is a product of that proud heritage.

Items Included:
  • Fisher FX-3 Ferro Magnetic Probe
  • Carrying Case
  • Spare Batteries
  • User Manual

Metals Detected

Ferromagnetic only (iron and steel)


9V Alkaline (NEDA 1604)

Battery Life

35 Hours

Operating Temperature

0 to 122°F (-18 to 50°C)

Waterproof Length

36" (91 cm)

Output Indication

Audio, 42 ¼” (5.7cm) diameter speaker or headphones


2.5 lbs



Fisher FX-3 User Manual4.18 MB