M-101 Metal Probe

  • Detects all metals
  • Accurately pinpoints steel reinforcing bars, or rebars in concrete; (typically 8-9" depth for 1/2" diameter rebar)
  • Detects intersections of rebar or mesh
  • Audio and visual indications of nearby metal
  • Rugged construction
  • VLF, (Very Low Frequency), operation
  • Operates on universally available 9V batteries
  • Quick tune ready for operation in seconds
  • Fully waterproof search loop


The M-101 Metal Probe is designed specifically for finding reinforcing bars, conduits, and other metal objects embedded in concrete, or buried soil. The 3 1/2" diameter search coil effectively locates and pinpoints small metal objects. Users may expect accuracy to 1/4" of the center line of the rebar. 

Turn the instrument on and only the penetration control need be adjusted for most operations, allowing maximum penetration depth for metals.  A preset circuit eliminates ground effects caused by highly mineralized materials and false signals due to loop movement.

The M-101 also can effectively locate small metal items carried on or within a person and is substantially more sensitive than the average low cost metal detectors used at airports, so that a given metal item can be found at a greater distance from the search loop itself.

Searches in water may be up to the control box. The search loop and cord are waterproof. Backed by Fishers industrial 2 year warranty.



  • Operating Frequency of Coil - 4.5 kHz
  • Sensitivity Adjustment - Range: 12:1
  • Output Indication - Meter - 1 milliamp, 1-100 linear scale
  • Speaker - 16 Ohm impedance
  • Headset (optional) - 8 Ohm impedence
  • Audio Frequency - 450 Hz
  • Power Supply   +/- 9V, (2) 9V NEDA 1604
  • Coil Configuration - Double D
  • Weight - 2.8 lbs. (1.3kg)
  • Control Box Dimensions  - 3 x 5 x 6 inches (8 x 12 x 16 cm)
  • Handle Dimensions - 0.75 x 23 inches (1.9 x 58.4 cm)
  • Shipping Weight - 4 lbs. (1.8 kg)
  • Shipping Dimensions - 26.5 x 6.25 x 6.25 inches (67 x 16 x 16 cm)



QTY P823

M-101 Metal Probe