Model FX-3 Ferromagnetic Locator, by Fisher

Model FX-3 Ferromagnetic Locator, by Fisher
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The Fisher FX-3 Ferro Probe senses fluctuations in the earth's magnetic field caused by buried survey markers, pipes, well casings, valves,iron relics, septic tanks and other ferromagnetic (iron or steel) objects. Because it's a differential induction magnetometer, the FX-3 locates buried iron objects far beyond the reach of ordinary (search coil type) metal detectors.

Like other Fisher detectors, the FX-3 is easy to operate just turn it on and go. It weighs just 2 1/2 lbs (1.14 kg) and features motion detection (the tube probe must be moving to detect a target).

When the FX-3's two sensors come across a large, ferrous object, the FX-3 signal tone increases in pitch and volume. When the FX-3 probe is directly over the target, the signal becomes silent and picks up again when moved past the target.

The FX-3 is extremely sensitive to iron with a large surface area, highly magnetized objects and long objects buried vertically. Large or small, if it's ferrous, the FX-3 is designed to find it. In addition to its industrial uses, the FX-3 can be used by archeologists and treasure hunters to find iron relics and other buried ferrous artifacts.


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  • Simple, one-knob operation
  • Automatic battery check
  • Build-in speaker of headphone input
  • Waterproof  probe up to control box
  • Rugged, Lightweight, balanced design
  • Detects only ferromagnetic objects (iron or steel) or a magnet.
  • Powered by a single 9-Volt battery
  • Recessed control panel
  • Low cost and low maintenance
  • Advanced solid state electronics
  • Hard-shell carrying case
  • Fisher Gold Seal 5-Year Warranty

Cushioned, stereo headphones are available optionally as an accessory.

A shock-resistant, foam-lined, hard-shell carrying case protects the FX-3 during travel to and from a search site. Overall dimensions of the FX-3 in its carrying case are 5” x 6” x 45-1/2” (12.7 x 15.2 x 115.5 cm), and it weighs just 9 lbs.


5-Year Gold Seal Warranty

Fisher warrants the FX-3 to be free of defects in materials and workmanship when it is shipped from the factory. The terms of this warranty are fully explained in a warranty registration card that accompanies the instrument. Complete field and factory service facilities support the warranty. Warranty may vary in foreign countries. Please see Corrosion Control Products Company for details. Fisher does not warrant suitability to specific use. Fisher or Corrosion Control Products Company shall in no event be liable for any direct, incidental, consequential or indirect damages.


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FX-3 Specifications

  • Battery: 
    One 9-Volt transistor battery (NEDA 1604)
  • Battery Life:
    Carbon Zinc 25 hours
    Alkaline 35 hours
  • Operating Environment:
    Carbon Zinc 40°F to 122°F (4°C to 50°C)
    Alkaline 0°F to 122°F (-18°C to 50°C)
  • Waterproof Length: 36 inches (91 cm)
  • Output Indication:
    Audio, 2 ¼” dia. speaker or headphones
  • Weight: 2 1/2 lbs (1.14 kg)
  • Length: 42-1/4” (95 cm)
  • Shipping Weight: 
    9 lbs (4 kg) including hard-shell carrying case
  • Shipping Dimensions: 
    5” x 6” x 45-1/2” (12.7 x 15.2 x 115.5 cm)

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