Detailed Overview

Principle of Operation

The instrument relies on magnetic flux leakage — a method that uncovers hidden flaws by sensing disruptions in magnetic flow through steel saturated by a magnetic field. In the world of inspection, this technique is known as magnetic rope testing (MRT).

Strong magnets within the magnetic head fully magnetize the rope. As long as the rope is sound, the magnetic field above its surface stays even, and the sensors register a steady signal. But when the rope bears scars — broken wires, corrosion, or any change in cross-section — the magnetic field warps and leaks more intensely at those spots. The sensors detect this disturbance as a shift in signal.
The base unit then gathers, stores, and processes this data, turning invisible flaws into readable insight.

Basic Unit Intros

There are two basic unit models — BU-16 and BU-M. Both are handheld, equipped with data storage and download capability, built with waterproof keypads, rechargeable batteries, and leather pouches to shield them from dust and rain. Each can be mounted onto the magnetic head to move along a stationary rope, allowing standalone operation.

The BU-16 is compatible with most magnetic heads, except models MH6-26, MH22-45, MH60-85, MH80-120, MH100-150, and MH100-175. It features a dual-section LED display for showing measurement data and distance during inspection.

Magnetic head MH22-45 has non-detachable sensors and a set of sleeves.