Ground Penetrating Radar (GPR) System SEN-RD3000 – Dual-Frequency Integrated Survey Instrument

Overview

The Senbe SEN-RD3000 is a fully digital, ultra-wideband (UWB) ground penetrating radar system engineered for non-destructive subsurface investigation in environmental monitoring, municipal infrastructure assessment, and regulatory enforcement applications. Operating on the principle of electromagnetic wave propagation and reflection at dielectric discontinuities, the SEN-RD3000 transmits short-duration, high-frequency pulses into the ground and records time-domain reflections from buried objects or stratigraphic interfaces. Its core architecture centers on a high-speed pulse generator and picosecond-level sampling technology, enabling precise time-of-flight measurement with sub-nanosecond resolution. Unlike conventional single-frequency GPR systems, the SEN-RD3000 integrates a proprietary dual-band antenna array—simultaneously emitting and receiving signals across two distinct center frequencies—allowing concurrent acquisition of shallow-high-resolution and deep-penetration data within a single scan pass. This architecture supports effective detection of subsurface anomalies—including non-metallic pipes, voids, utilities, and buried structures—within a depth range of 0–8 meters in typical soil conditions (e.g., dry sand, loam, or compacted fill), subject to site-specific conductivity and permittivity.

Key Features

• Dual-frequency integrated antenna array: Enables simultaneous shallow (e.g., 500–1000 MHz) and deep (e.g., 100–400 MHz) band operation without hardware switching or re-surveying.
• Fully digital signal processing architecture: Software-controlled gain adjustment, real-time filtering, and automatic time-zero calibration eliminate manual setup dependencies.
• Wireless data transmission capability: Supports IEEE 802.11n Wi-Fi for remote preview, live streaming, and field synchronization with tablet-based control units.
• Compact, ergonomic design: Host and antenna are mechanically integrated into a single unit; total mass < 8.5 kg, optimized for push-cart or handheld deployment.
• Intelligent real-time interpretation engine: Onboard algorithms highlight hyperbolic diffraction patterns, estimate burial depth via velocity calibration, and classify anomaly geometry based on amplitude-phase coherence.
• Battery-powered operation: Rechargeable Li-ion battery pack provides ≥6 hours of continuous scanning under standard duty cycle (100 kHz PRF, 2 GHz sampling).

Sample Compatibility & Compliance

The SEN-RD3000 is compatible with a broad range of near-surface geological and anthropogenic media, including asphalt, concrete, gravel, clay, sandy soils, and backfilled trenches. It detects both conductive (e.g., metallic conduits, rebar) and non-conductive targets (e.g., PVC, HDPE, PE gas pipes, ceramic sewer lines, voids, and buried concrete foundations) through contrast in relative permittivity (ε_r) and electrical conductivity (σ). While not certified to IEC 61000-6-2/6-4 for EMC immunity, its emissions comply with FCC Part 15 Subpart B Class B limits for industrial field equipment. The system supports audit-ready data logging compliant with GLP principles: all raw traces include embedded GPS timestamps (when paired with external GNSS module), operator ID, survey line metadata, and firmware version. Raw data export follows SEG-Y Rev 1.0 format for interoperability with third-party processing software (e.g., ReflexW, GPR-Slice, or SeisImager/GPR).

Software & Data Management

The SEN-RD3000 ships with Senbe GPR Studio v3.x—a Windows-based desktop application supporting real-time display, post-processing, and report generation. Core functionalities include background removal, migration (Kirchhoff and phase-shift), gain balancing, spectral analysis, and depth slicing. All processed profiles can be georeferenced using optional RTK-GNSS input and exported as GeoTIFF, KMZ, or CSV. The software maintains full trace-level audit trails: every processing step is logged with user action, timestamp, and parameter values. For regulated environments (e.g., EPA-led enforcement surveys or municipal asset inventories), the system supports optional 21 CFR Part 11-compliant electronic signature modules when deployed with domain-authenticated Windows accounts and encrypted database storage.

Applications

• Environmental compliance enforcement: Rapid identification of clandestine wastewater discharge pipes, illegal septic leach fields, and buried hazardous waste containers.
• Municipal utility mapping: Inventory and condition assessment of aging water mains (cast iron, ductile iron, PVC), district heating pipelines, and stormwater culverts.
• Transportation infrastructure: Pre-construction utility clearance along railway right-of-ways and highway corridors per ASTM D6432 and ISO 22476-11 standards.
• Archaeological and forensic investigations: Detection of buried vaults, unmarked graves, or concealed structural features without excavation.
• Industrial site characterization: Locating buried tanks, grounding grids, cable trays, and foundation footings prior to drilling or trenching.

FAQ

What types of non-metallic pipes can the SEN-RD3000 detect?

It reliably detects PE, PVC, HDPE, and concrete pipes in soils with moderate conductivity (< 15 mS/m); detection sensitivity decreases in highly conductive clays or saline saturated zones.

Does the system require calibration before each survey?

No—automatic time-zero correction and adaptive gain stabilization are applied in real time; velocity calibration is recommended only when estimating depth in heterogeneous media.

Can data be processed in the field without a laptop?

Yes—basic profile viewing, gain adjustment, and annotation are supported on the integrated 7-inch touchscreen; advanced processing requires GPR Studio on Windows.

Is the SEN-RD3000 suitable for use on paved surfaces?

Yes—its dual-frequency antenna achieves consistent coupling on asphalt and concrete; optional wheel encoder ensures accurate distance registration.

What is the maximum recommended scan speed for optimal resolution?

For 0.1-m lateral sampling interval and stable waveform fidelity, maintain ≤3 km/h on smooth surfaces; slower speeds (≤1.5 km/h) are advised for high-resolution shallow mapping.