All Purpose Locator
MAC-51Bx
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In the LO and HI modes, the receiver's audio signal provides a sharp null when its tip is directly over the target. In the MAG mode (no transmitter required) the audio signal peaks when the receiver's tip is over a ferrous target. You can trace the 571 Hz LF signal conductively applied to any continuous metal conductor up to 4000 feet.
The receiver's on-the-fly mode-changing feature lets you locate a complete break using the LO mode, and then continue on to trace beyond the break in the HI mode, or trace a metal pipe joined with non-conductive gaskets.
Dual Frequency Cable and Line Tracing Modes
 The MAC-51Bx simultaneously transmits 82.5 kHz (HF) and 571 Hz (LF) signals. This feature lets you select and compare received audio signals from both frequencies along with magnetic information without having to return to the transmitter.
Transmitter 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.
Transmitter 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.
Magnetic Locating Mode
 Only the MAC-51Bx receiver is required when operating in the magnetic mode. Just set the Mode switch to MAG, the Gain control to mid-range, and you're ready to locate underground ferrous pipes, water meters, water valves, and property markers - or anything that has a magnetic field including the 50/60Hz electro-magnetic field generated by energized power lines.
Optional Mini-Transmitter
To Trace Non-Metallic Pipes
Expands Locating/Tracing
Capability
The MT-2 (Sonde) is a miniature transmitter
designed to be used in conjunction with the
MAC-51Bx Receiver. It’s just what you need to
trace non-metallic pipes, pinpoint obstructions,
locate concrete septic tanks, and monitor the
course of utility tunneling under highways.
As the sonde, attached to the end of a sewer/
drain cleaning snake, is pushed through a
non-metallic pipe, it emits a strong signal
that you can detect and trace at depths up to
18 feet using the MAC-51Bx receiver set to
the HI mode.
Very easy to Attach
The sonde has one concave surface so it
can be secured to a plumber’s snake with
electrical tape.
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