Sigma 8PD

INTELLIGENT UNDERGROUND CABLE & PIPE LOCATOR

Sigma-8PD is a high-performance underground cable and pipe locator designed for accurate route detection, depth measurement and fault identification. It supports both active and passive detection modes and integrates GNSS positioning and Bluetooth data transmission. It is commonly used by utility professionals, engineers and contractors during construction, maintenance or surveying operations to avoid accidental damage to underground infrastructure.

Key Features
• Multi-function integration: route tracing, cable identification, fault location, GNSS mapping

• Real-time depth measurement with distortion alerts

• Passive detection with full-spectrum analysis

• Multiple signal output modes: direct, clamp coupling, radiation

• Bluetooth and GNSS modules for data logging and export

• IP65-rated rugged design with lithium battery power

• Color compass display:Underground pipelines penetration, infra-field multiple underground pipelines display

Technical Specifications
Component Specifications
Transmitter
Output Modes Direct, Clamp Coupling, Radiation, Fault Location Booster
Frequencies 640Hz, 1280Hz, 8kHz, 33kHz, 82kHz, 197kHz
Max Power 15W, 10-level adjustable
Display 320×240 color LCD, sunlight-readable
Battery 7.4V Lithium, >6Ah
Dimensions 280×220×90 mm
Weight 2.3 kg
Protection IP65
Receiver
Detection Modes Wide Peak, Narrow Peak, Valley, History Curve, Spectrum Analysis
Frequencies Same as transmitter + passive bands (AFB, power harmonics, RF bands)
Display 320×240 color LCD
Battery 7.4V Lithium, >3Ah
Dimensions 680×120×277 mm
Weight 2.0 kg
Protection rating: IP65

Optional Accessories
Depth measurement sensor
Transmitting clamp
Flexible identification clamp
Stethoscope
A-frame fault locator
GNSS antenna (internal/external RTK)
Sonde for non-metallic pipe detection

Applications:
• Cables (active and inactive cables)
• Metallic conductors
• Non-metallic conductors

Uses:
• Route tracing
• Depth measurement
• Pipeline surveys by Engineering Companies

Field tests have been successfully carried out in real conditions at a depth of 20 meters

4000A Series Underground Cable and Pipeline Locator

The 4000A Series underground cable and pipe locator can accurately locate and measure the buried depth of underground pipelines, cables, and optical cables without excavation as well as locate the damaged point of the outer anti-corrosion layer of the underground pipe and the fault point of the buried cable. It is suitable for various underground detection and inspection of metal pipelines, pipeline management and maintenance, municipal planning and construction, power supply and other departments.

Multiple Functions

1) Transmitter: three connection modes: inductive connection, direct connection and clamp connection; suitable for different applications.

2) The receiver functions: detecting the position, path, depth and tube current of underground pipes and cables.

3) Left and right positioning arrows indicate the target pipeline position fast and accurately; front and rear arrows and dB value indicates the point and size of the coating damage.

4) Backlight suitable for urgent use in the nighttime.

5) Optional GPS geolocation with the automatic mapping of the pipelines.

6) Optional professional data analysis software with the automatic detection report.

7) Unique feature of HZ-4000 : locating the breakdown points (pipeline breakdowns refer to the coating damaged points while electric cable breakdowns refer to the outer layer damages.); detecting the insulation damages of underground pipe and cable.