Magnetic / Metal Locators

GA-72Cd Magnetic Locator

Manual

The GA-72Cd Locator detects the magnetic field of iron and steel objects and energized power lines. It provides audio detection signals that peak in frequency when the locator’s tip is held directly over the target. The GA-72Cd has the option of nulling or peaking.

The GA-72Cd also has easy-to-read digital and bar graph which displays of signal strength and polarity. Once you have located a target using the audio signal, the digital readout and polarity indicators will help you to visually pinpoint the target and, in some instances, even determine its orientation.

MAC 51BX Cable and Pipe Locator

Manual

The MAC-51Bx consists of a magnetic locator, similar to the GA-72Cd model, and a null-over-target pipe and cable locator capable of locating on two frequencies: 571Hz and 82.5kHz. The receiver has a three position switch that lets you change modes, “on-the-fly”, between LO, HI, and MAG, for cable and line tracing with break locating, pinpointing a ferrous metal target, or identifying and pinpointing an energized 50/60 Hz power line. The unit can be used just like the GA-72Cd in MAG mode as well as the following:

Conductive Mode
If an exposed section of a target gas or water pipe is accessible, conductive coupling is the most reliable method for applying the trace signal. This mode has to be used to apply both HF and LF frequencies so that you can use all three features on-the-fly. Providing a good electrical contact between the clip and the conductive portion of the target line by removing rust or paint before attaching the clip is very important.

Inductive Mode (HF only)
Induction is achieved by placing the transmitter over the target cable/pipe or by using the optional Inductive Signal Clamp. It’s the easiest and quickest way to applying a trace signal that is strong enough for tracing most lines. The trace signal generates an alternating magnetic field around the cable which induces a signal into the receiver’s cable sensor. A sharp null in the audio signal between the two peaks occurs when the receiver’s tip is directly over the cable.