GSSI - Geophysical Survey Systems Inc. - Ground penetrating radar and electromagnetic equipment

SIR-3000 SIRveyor SIR-20 StructureScan HandyScan
SIR System-10B SIR System-10H Antennas GEM-300

GSSI is the manufacturer of the world's finest Ground Penetrating Radar Systems (GPR), also referred to as Subsurface Interface Radar (SIR®) Systems. These systems are used to non-destructively explore the subsurface of the ground or other man-made materials for a variety of applications.

GPR systems are used by Geologists, Geophysicists, Engineers, Environmental Engineers, Highway Engineers, Mining Engineers, Archaeologists and Forensic experts to solve complex problems related to their specialities. In the fields of civil engineering, construction, geology, hydrogeology, archaeology and environmental protection, what you can't see often causes huge problems

Ground penetrating radar is used in the following fields:

  • Environmental - Site Assessments, Landfills, USTs and Drums, Pre-Construction Surveys
  • Geotechnical and Mining - Bedrock, Watertables, Fractures
  • Archaeological and Law Enforcement
  • Structural Engineering - Void, Structures, Other Engineering Applications
  • Transportation Engineering - New Bridge Deck Quality Assurance, Existing Bridge Deck Condition Inspection, Road Structure Thickness Inspection
  • Utility Mapping & Detection


SIRveyor SIR-20

GSSI introduces the next generation in GPR!

SIRveyor SIR-20The new SIRveyor SIR-20 is the first in a new generation of GPR data acquisition systems. The SIR-20 combines a rugged, powerful data collection unit and a laptop PC with GSSI's Windows-based RADAN NT post processing software.

Data collection with the SIR-20 is extremely user-friendly. The flexibility of GSSI SIR systems allows the use of our full product line of antennas for maximum range in depth penetration.

The SIR-20 allows the operator to collect data in single line mode or collect data specifically for 3D format, making data processing quick and easy.


SIRveyor SIR-20 system
  • Multi-channel data collection at 800 scans per second
  • Integrated data collection and post-processing for instant results
  • Provides 3D imaging
  • Controlled by ruggedized notebook computer running Windows 2000™
  • System is ideal for surveys of highways, bridges and other multi-channel applications
  • GPS compatible
3D image of pipes located at 1m depth

3D QuickDraw data example showing
pipes at a depth of 1m.

RADAN NT and the 3D QuickDraw module enables the user to enhance GPR data to its full potential. This software overcomes the obvious limitations of the common form of GPR data analysis, the 2D cross-section. 3D display has the advantage of looking at the entire survey area at once.

The ability of seeing GPR data as 3D cubes enables a more intuitive approach to data analysis and interpretation. Multiple viewing options allow the user to move around in the data, many time revealing features not visible in traditional vertical data profiles.


The StructureScan III system is the latest tool for the Non-Destructive Testing (NDT) of concrete structures.

Finally, a quick, easy, safe and effective way to locate buried obstruction in concrete structures prior to drilling, cutting or coring.

  • Inspect walls, floors, decks, slabs, tunnels, balconies and garages.
  • Locate rebar, tension cables, conduits, voids and measure slab thickness.
  • Thousands of square feet of concrete can be inspected in a day.
  • Locate targets to a depth of 18 inches.
  • Detect and map the relative concrete condition for rehab planning.
SIRveyor SIR-20 system SIRveyor SIR-20
Model 5100 Antenna Model 5100

StructureScan III Components:

  • SIR-20 GPR system (2 channels)
  • Model 5100 antenna (1.5 GHz)
  • Model 612 Encoder with extended arm
  • Model 613 Handcart with encoder
  • Data collection pad
  • Paper pad (20 sheets)
  • Instruction manual
The data example on the right contains post-tension cables and is displayed using GSSI's new Super 3D module. These data were obtained at the top level of a parking garage in Minnesota, on an area recently repaired and overlaid with concrete.

The progression of the three depth slices clearly indicates that the reinforcement elements trending left-to-right display the typical, draped pattern of post-tension (P.T.) cable installation. As the P.T. cables extend from one end of the slab to the other, they also "sag" between their primary support elements - almost to the bottom of the slab.

Upper 3D depth slice shows top of tension cables (left-to-right) "draped" over reinforcement at left, center and right.

In middle depth slice, the same cables begin to appear in the two gaps where they couldn't be seen at shallower depths.

Deeper "sags" in the cable seen more clearly than draped regions, which were prominent in the shallower depth slices.

Data courtesy of Concrete Inspection Services, Inc. (CISI)

StructureScan data example

7.5 x 11 meters square (approx. 930 sq. ft.)


First all-in-one GPR system for use in the repair and maintenance of concrete buildings and structures.

  • Lowest cost GPR system
  • Detects wire mesh, rebar and pipes (metal and fluid-filled PVC)
  • Depth of penetration 1/4" to 8"
  • Collects 50 feet of information
  • Measure asphalt and concrete thickness
  • Obtain C-Scan (3D) image with optional software
HandyScan and Acessories

Basic Model

  • Data collection instrument
  • Carrying case
  • Three batteries
  • Battery charger
  • Printer and cable
  • Recording paper (5) rolls
  • Instruction Manual
HandyScan system

Advanced Model

All components included in the Basic model, plus:

  • Serial data transfer cable
  • Data collection pad
  • Paper pad (20 sheets)
  • Post-processing software for Windows NT or 2000 (for use on customer's computer)

HandyScan data

SIR System-10B

SIR 10B The SIR System-10B is a versatile, multi-channel, digital GPR system. The SIR-10B consists of a model MF-10B mainframe and a CD-10B control display equipped with a color VGA monitor. A key feature of the SIR-10B is multiple antenna inputs. Two (2) antenna inputs are standard (4 optional) with the SIR-10B, which facilitates the use of various antenna geometry's such as monostatic, bistatic or multi-offset profiling, multiple parallel scans along a transect path, transillumination and tomographic studies.

Multiple channel capabilities can greatly reduce the time necessary to complete a survey. Additionally, the system has a 1.3 GB internal hard drive for reliable data storage and a 2.3 GB tape drive for real time storage or back-up for archiving data. Real-time data processing is possible in the SIR-10B and an optimal high quality thermal plotter provides real-time hard copy of field data. The system's flexibility makes it more suitable for a broader range of applications and it can run all GSSI antennas.

SIR System 10B and 10H Specifications


SIR System-10H

The SIR System-10H is a digital system designed for high-speed data acquisition. This system was developed under the Strategic Highway Research Program (SHRP) Project H104A as an instrument to investigate paved structures. The result is a multi-channel system capable of collecting data at posted highway speeds. This data is used to determine pavement layer thickness and pavement material condition of interest to maintenance engineers.

  • It features multiple data channels for greater lane coverage and survey wheel or DMI-controlled acquisition for accurate distance measurements.
  • Multiple digital data storage devices, 2.6 GB internal hard drive and a 5 GB tape drive, for easy data transfer and archiving.
  • Video Output for correlation of road surface conditions to collected data.

The SIR-10H can be used for many infrastructure applications like utility locating, concrete inspection, structural analysis and can run all GSSI antennas.

SIR System 10B and 10H Specifications


For additional info please visit the GSSI website in the USA