Loc3 Tx


The broadband transmitter has selectable induction and direct connection frequencies from 98Hz to 200kHz, SD mode (Signal Direction), fault find and true resistance measurement up to 1 Mohm. The two inch by one-inch dot matrix display with LED backlight shows output current, connection type, volts, resistance, frequency, volume, battery condition and high voltage warnings.


The optional Transmitter Link (Tx-Link) installed in the receiver and transmitter, remote operation of the transmitter from the receiver is possible. The range of the radio transmitter link depends on having a clear “line of sight” between receiver and transmitter but is typically around 985 ft./300m. Signal Direction (SD) mode feature verifies if the line being located is the target that the transmitter is connected to.

When a transmitter is connected to a target line, the signal travels along it and finds the easiest way to travel back, usually via the ground and ground stake. However, very often the signal will travel back along adjacent utilities which offer an easier route. As a result, there can be multiple signals radiating from utilities in the area making it difficult to identify the target line. These return signals are typically traveling in the opposite direction than the applied signal. The Signal Direction feature identifies which direction the signal is flowing and hence the target line.

Packaged in a lightweight, rugged, ergonomic IP54 housing, the transmitter provides consistent current output in direct connect, clamp or induction modes and protection against incoming voltages up to 240V.

Key Features

  • Optional transmitter-to-receiver radio link
  • SD mode for positive location in congested areas
  • AC/DC external power source
  • Built-in AVO meter
  • 2 Watt available (5 Watts and 10 Watts)



With Alkaline battery tray: 8.6lbs (3.9kg) [5 watts]

With Alkaline battery tray: 9.9lbs (4.4kg) [10 watts]

With Rechargeable battery tray: 7.15lbs (3.24kg)


13.1in(L) x 7.2in(W) x7.3in(H) (332mm x 182mm x 185mm)

Display Type

Monochrome-dot-matrix graphic LCD display with LED backlight

2.4in x 1.3in (60mm x 32mm)

Power Options

12 x alkaline “D” cells [10 watts]

8 x alkaline “D” cells [5 watts]

12~22V external DC power

Optional Li-Ion rechargeable battery pack 18V

Battery Life

Output Power Alkaline Li-Ion(Rechargeable)

1 watt 25 hours 50 hours

5 watt 6 hours 10 hours

10watt 4-5 hours 6 hours

At 70ºF (21ºC)-continuous use (based on the battery type and quality)

Li-Ion batteries will withstand 500 charging life cycles