Cable Locators – fast, accurate utility locating<
Cable locators help you trace buried lines quickly and avoid strikes before you dig. Systems support passive modes (e.g. power/RF) and active locating with a transmitter, providing depth indication, guidance arrows and clear audio cues.
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How does a cable locator work?
Locators detect the electromagnetic field around utilities. In passive mode, existing fields (e.g., 50/60 Hz or radio) are detected. In active mode, a transmitter injects a defined frequency. Sonde mode traces battery-powered transmitters placed in ducts or pipes.
Frequencies & use cases
- Low (e.g., 512/640 Hz, ~1 kHz): greater depth, directional tracing, minimal bleed
- Mid (e.g., 8–9 kHz): balanced choice for mixed environments
- High (e.g., 33 kHz): universal coupling to short or broken conductors
Selection guide
- Task: route proving, service connections, fault finding, pre-excavation checks
- Frequency set: right mix of active/passive bands and sonde support
- Transmitter power: sized for length, depth and ground return
- Functions: depth, current direction, guidance, data logging
- Accessories: signal clamp, stakes, A-frame for sheath faults, connection & search leads
Pro tips
- Scan in multiple modes before excavation (passive and active)
- Ensure a solid ground/return path for strong injection
- Map the route in segments and document readings
FAQ
- Active vs. passive—what’s the difference?
- Passive uses existing fields; active injects a chosen frequency for higher precision and selectivity.
- Can I trace non-metallic pipes?
- Indirectly, with tracer wire or a sonde. Plain plastic requires a sonde/tracer to be detectable.
- How accurate is depth?
- Depends on signal quality, soil and alignment. Good coupling and correct settings improve accuracy.
- Which frequency should I choose?
- Low for deep/long well-earthed lines; 8–9 kHz for mixed sites; 33 kHz for short/discontinuous conductors.