Fisher M-101 Metal Detector

Fisher M-101 Rebar Locator & Metal Probe

Purpose built for detecting reinforcing steel and other ferrous materials embedded in concrete.

The M-101 is engineered for construction, survey, and inspection professionals who require accurate rebar location prior to coring, drilling, or cutting. With stable signal response, pinpoint accuracy, and rugged construction, it delivers reliable performance in demanding field conditions.

Instrument Configuration and Durability

The M-101 features a straightforward control layout with two primary adjustments: sensitivity and penetration depth. A preset circuit minimizes interference from mineralized soils or loop movement, ensuring consistent readings. Operators can monitor feedback through the analog meter or audio signal, with the control box designed for chest or belt mounting to reduce fatigue. The waterproof search loop withstands use in wet conditions, while the overall unit weight of approximately 2.8 pounds makes it practical for extended surveys.

Detection Method and Target Response

Using a VLF double-D search coil, the M-101 provides a tightly focused detection field. It responds exclusively to ferrous metals such as rebar, mesh, and conduit within concrete. The instrument is capable of pinpointing rebar to within about ¼ inch of its centerline under favorable conditions. As the search loop approaches a target, both audio tone and meter deflection increase, allowing operators to narrow down location with precision.

Power, Size and Ruggedness

• Power Source: Two standard 9V batteries (NEDA 1604)
  
• Battery Life: Approximately 50 hours of operation at room temperature
  
• Dimensions and Weight: Overall weight about 2.8 pounds for portability
  
• Construction: Waterproof loop and cord rated for immersion up to the control box
  
• Operating Environment: Designed for use in typical construction and survey field conditions
  

Why Field Operators Choose the M-101

The M-101 is valued for its ¼ inch pinpoint accuracy, stable signal processing, and simple control system. Its combination of portability, waterproof coil design, and extended battery life makes it well suited to concrete inspection, rebar mapping, and pre-cutting safety checks. Fisher’s two-year warranty provides added assurance of long-term reliability.

Contact Green Equipment Company to request a quote or schedule a demonstration of the M-101.

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FAQs

Q: What applications is the M‑101 designed for?
A: The M‑101 is designed to locate metal objects embedded in concrete, such as rebar, conduits, PK nails, wiring, and wall studs. It is used to ensure safe coring or cutting operations.

Q: How accurate is the M‑101 in pinpointing rebar?
A: The detector offers roughly quarter‑inch pinpoint accuracy and allows the operator to adjust penetration depth and sensitivity manually.

Q: What is the construction and battery life of the M‑101?
A: It features a rugged housing with a waterproof search loop and cord. Powered by two 9 V batteries, the M‑101 provides approximately 50 hours of continuous operation.

Q: How is feedback delivered?
A: The instrument uses a VLF double‑D search coil and provides both analog meter and audio feedback. Users can manually balance the ground to minimize interference.