Loc3 Series 10-Watt Broadband Transmitter

The 10-Watt 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 300m /985 ft. 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.

Standard specifications

BatterySupplied with 12 x D cell alkaline batteries
Optional Li-ion rechargable battery tray with charger
Battery Life

Li-ion batteries will withstand 500 charging life cycles

Operating Frequencies

Induction – Available frequencies between 98Hz and 200kHz

Direct Connection – Available frequencies between 98Hz and 200kHz

Clamp – Frequencies between 8kHz to 131kHz


With Alkaline battery tray: 9.9lbs (4.4kg)

With Rechargeable battery tray: 7.15lbs (3.24kg)


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

Operating Temperature

-4oF to 122oF (-20oC to 50oC)

Operating modes

Induction mode – applies signal inductively using internal antenna

Direct connection mode – applies signal directly to the cable by clipping one output lead to the cable, the other to an independent ground

Clamp mode – applies signal using an inductive clamp (aka toroid or coupler) that is placed around the target pipe or cable

Output Protection

Output protected against accidental momentary connection to up to 240V AC

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