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GSSI 2600 MHz high resolution antenna

2.6 GHz GPR antenna

The 2600 MHz antenna is an ultra-high resolution antenna suitable for the inspection of concrete structures, the location of embedded rebar, post tension cables and conduits.

Uses

You can read more about typical applications for the 2.6GHz antenna on the following pages:

Concrete floor slab surveys
Locating services and conduits in concrete slabs
Locating Tendon Ducts in Post-Tensioned Concrete
Locating under floor heating pipes
On-site rebar location and mark-up surveys
Rebar mapping and concrete imaging
Void location in construction and below slabs

Specification

Centre Frequency: 2600 MHz
Depth Range: 0-0.4 m (0-12 in)
Weight: 1.8 kg (4 lbs)
Dimensions: 3.8x10x16.5 cm (1.5x4x6.5 in)
Model 52600S
Manufactured by: GSSI

GSSI 2000 MHz Palm antenna

2.0 GHz GPR Palm antenna

The Palm Antenna is the most compact GSSI antenna available to date. It measures only 104.5×91.5×154.7 mm enabling it to be used in very tight and confined spaces. It is particularly good at scanning into corners, against walls and around obstructions (it can scan to within 45mm of an obstruction).

The antenna includes a dedicated survey wheel (located to the rear of the antenna, a replaceable skid plate, and removable handle to reduce antenna height, if necessary.

Uses

On site the main benefit of this antenna over others of a similar frequency, is its compact size. This makes it very useful for scanning in areas where access is restricted, or where obstructions, such as pipes, ornate mouldings, etc. are present. You can read more about typical applications for the GSSI 2000 MHz Palm antenna on the following pages:

Locating embedded metal in masonry
Locating Tendon Ducts in Post-Tensioned Concrete
On-site rebar location and mark-up surveys
Rebar mapping and concrete imaging

Specification

Centre Frequency: 2000 MHz
Penetration Depth: up to 400mm
Uses: rebar location/mapping and concrete investigation
Manufactured by: GSSI

 

1600 MHz antenna

1.5 GHz GPR antenna

The 1600 MHz antenna is a high-resolution, all-purpose antenna suitable for the inspection of concrete structures to locate/map rebar, post tension cables and conduits. It is typically used for general investigation works including floor slabs, walls, bridge decks and shallow void detection.

Uses

You can read more about typical applications for the 1600 MHz antenna on the following pages:

Chimney flue location
Concrete floor slab surveys
Locating services and conduits in concrete slabs
Locating embedded metal in masonry
Locating Tendon Ducts in Post-Tensioned Concrete
Locating under floor heating pipes
On-site rebar location and mark-up surveys
Rebar mapping and concrete imaging
Retaining wall surveys
Void location in construction and below slabs
Wall and slab thickness measurement

Specification

Centre Frequency: 1600 MHz
Penetration Depth: up to 500mm (in concrete)
Uses: Rebar location/mapping, concrete investigation and shallow void detection
Manufactured by: GSSI

900 MHz GPR antenna

900 MHz GPR antenna

The 900 MHz antenna is suitable for numerous applications requiring shallow penetration down to 0.9 m, including void detection, concrete/construction thickness measurement and shallow utility location. It can also be used for location of deeper rebar.

Uses

You can read more about typical applications for the 900MHz antenna on the following pages:

Chimney flue location
Locating embedded metal in masonry
Retaining wall surveys
Void location in construction and below slabs
Wall and slab thickness measurement
Railway ballast thickness and evaluation

Specification

Centre Frequency: 900 MHz
Penetration Depth: up to 900mm
Uses: deeper rebar location/mapping, void detection, shallow utility
Manufactured by: GSSI

400 MHz GPR antenna

400 MHz GPR antenna

The 400 MHz antenna is most commonly used for detection and mapping of utilities, as well as shallow engineering and environmental applications.

Uses

You can read more about typical applications for the 400 MHz antenna on the following pages:

Retaining wall surveys
Void location in construction and below slabs
Wall and slab thickness measurement
Railway ballast thickness and evaluation

Specification

Centre Frequency: 400 MHz
Penetration Depth: up to 2m
Uses: Utility, engineering, environmental, void detection
Manufactured by: GSS

300/800 MHz dual frequency (DF) antenna

300/800 MHz dual frequency (DF) antenna

The 300/800MHz dual frequency (DF) antenna records two sets of data (one for each antenna frequency) enabling shallow and deeper targets to be detected at optimum resolution. The resolution and detail of GPR scan data decreases with lower antenna frequencies; it is therefore desirable to use the highest frequency possible, while still meeting the objectives of the survey. The data can be merged using Radan software to display both sets of data in a merged file making data analysis and interpretation easier and more efficient.

Uses

You can read more about typical applications for the 300/800 MHz dual frequency antenna on the following pages:

Retaining wall surveys
Void location in construction and below slabs
Wall and slab thickness measurement
Railway ballast thickness and evaluation

Specification

Centre Frequencies: 300 and 800 MHz
Penetration Depth: up to 4m
Uses: utility surveys, archaeology, deep construction detail
Manufactured by: GSSI

270 MHz GPR antenna

270 MHz GPR antenna

The 270 MHz is suitable for detection and mapping of deeper utilities, as well as shallow engineering and environmental applications.

Specification

Centre Frequency: 270 MHz
Penetration Depth: up to 6m
Uses: Utility, engineering, geotechnical
Manufactured by: GSSI

GSSI SIR-4000 control unit

GSSI SIR-4000 control unit

The SIR4000 is a GPR data acquisition system and control unit from GSSI designed to operate with analogue and digital antennas, including the latest dual frequency antennas. Other improvements over the SIR3000, which it replaces, include advanced display modes and filtering capabilities for ‘in-the-field’ processing and imaging.

GSSI SIR-3000 control unit

GSSI SIR-3000 control unit

The SIR-3000 is a small, lightweight control unit compatible with all GSSI antennas and offers a flexible option for multi-application users.

  • Lightweight and portable
  • Rugged and weather resistant construction
  • Windows-based user interface
  • High-resolution colour screen
  • Use handheld or mounted on cart
  • Removable, rechargeable batteries
  • Compatible with all GSSI antennas
  • GPS integration
  • Internal data storage and removable compact flash card memory

GSSI SIR-30 control unit

GSSI SIR-30 control unit

The SIR-30 from GSSI is a multi-channel GPR system offering a number of advantages over single-channel systems such as the SIR-3000. As the name suggests, multi-channel allows several antennas to be used simultaneously; in the case of the SIR-30 up to 4 (although you can piggy-back two units giving a total of 8 channels). The SIR-30 also offers real time data processing including migration, surface positioning, signal floor tracking and adaptive background removal.

Ideal for high-speed data collection of: measuring pavement layer thickness, detection of cavities, airport runway assessment, detection of fouled/clean ballast and utility detection.

UtilityScan DF

UtilityScan DF

The GSSI UtilityScan DF is a dual frequency GPR system designed for utility location. It features a digital dual-frequency antenna (300 and 800 MHz) allowing shallow and deep targets to be detected simultaneously with a single pass of the antenna. This reduces time on site, whilst at the same time improving utility detection rate.

Data Display

The UtilityScan DF has several modes to view the data in real time during data collection:

  • Split View - allows the two channels to be viewed simultaneously, aligned one above the other
  • Blend Mode: This displays a multi frequency data fusion in real time combining the high resolution near-surface data (800MHz) with the lower depth detail (300MHz) in a single view
Flexibility

Although the UtilityScan DF is primarily designed for utility surveys, we are finding it useful for other GPR surveys such as:

  • Detection of underground obstructions
  • Locating underground voids, especially under concrete or asphalt pavements
  • Burial sites
  • Geological investigation
  • Archaeology

Manufactured by: GSSI

Structurescan mini 3D

Structurescan mini 3D

The StructureScan Mini is an all-in-one GPR system for concrete inspection. With a 1.5GHz antenna, this handheld system is useful for rebar detection to depths of up to 400mm. Integral software on the 3D model provides a plan view of reinforcement (an x-ray like image). Our unit is mainly used by our Building Inspection department for rebar detection prior to coring, for which it is ideally suited.

Specification

Centre Frequency: 1.5 GHz
Penetration Depth: up to 400mm
Uses: detection of rebar, conduits and post-tension cables
Manufactured by: GSSI

GSSI StructureScan Mini XT

GSSI StructureScan Mini XT

The StructureScan Mini XT  is an all-in-one GPR system for concrete inspection. With a 2700 MHz antenna, this handheld system is useful for rebar detection to depths of up to 400mm. Integral software on the 3D model provides a plan view of reinforcement. The system can also be used with the following add-on accessories: Palm XT external antenna, LineTrac XT, and an extension pole.

Specification

Centre Frequency: 2700 MHz
Penetration Depth: up to 350mm in concrete
Uses: detection of rebar, conduits and post-tension cables, voids and slab thickness measurement
Manufactured by: GSSI

Ground Penetrating Radar equipment

Ground Penetrating Radar systems generally comprise two main components: a control unit, usually including a rechargeable battery to power the system, and antenna, or they can be an all in one unit.

For a successful GPR site survey, we strongly believe that it is crucial the survey is conducted by a suitably trained and experienced surveyor, using the most appropriate GPR equipment available.

The core of our equipment pool that we use daily includes, but is not limited to, the following:

GPR Antennas

The antenna transmits the GPR signal from the control unit into the sub-surface as a series of pulses. Reflections are produced from changes and features within the sub-surface and these, together with amplitude and time travel information, are received by the antenna. This information is sent back to the control unit, where the information is saved electronically and displayed on screen.

GPR scans can be undertaken using antennas with different central frequencies. The resolution and detail of GPR data increases with higher antenna frequencies; however, the depth of penetration decreases. As a general rule, it is desirable to use the highest frequency possible, while still meeting the objectives of the survey. When undertaking site surveys, we carry a range of antennas which may be suitable for the conditions likely to be encountered. This enables us to select the most suitable antenna. We often scan using multiple frequencies to ensure the best possible data.

GSSI 2600 MHz antenna
GSSI 2600 MHz high resolution antenna

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GSSI 2000MHz Palm antenna
GSSI 2000 MHz Palm antenna

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GSSI 1600 MHz antenna
1600 MHz antenna

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GSSI 900 MHz antenna
GSSI 900 MHz antenna

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400 MHz antenna
GSSI 400 MHz antenna

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300/800 MHz dual-frequency antenna
GSSI 300/800 MHz dual-frequency antenna

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GSSI 270 MHz antenna

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GPR Control units

The control unit contains the electronics that generate and control the GPR pulse of electromagnetic energy waves that the system’s antenna sends into the sub-surface.

The control unit also includes an in-built computer, although some systems use an external laptop. The computer saves the GPR data generated by the antenna’s receiver on disk/solid state memory.

Most control units include an integral display unit. This enables a visual means of configuring the system for the survey. It also displays the GPR data in real time enabling preliminary interpretation of the data on-site and to ensure that the objectives of the survey are met. More detailed analysis is generally undertaken off site by uploading the saved data files and using specialist software to process and interpret the data.

SIR 4000 control unit
GSSI SIR 4000 control unit

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GSSI SIR 3000

GSSI SIR 3000 control unit

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GSSI SIR 30

GSSI SIR 30 multi-channel control unit

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All-in-one GPR systems

There is an increasing number of-all-in one GPR systems available. These typically house the control unit, antenna and power supply all in one unit. Because the component parts are all fixed, the main advantage of these systems is that they are mostly pre-configured and hence simple to use. They are however also very limiting. As the component parts are fixed, they lack versatility and can’t be modified to suit site and survey conditions. For this reason, they tend to be one trick ponies and are designed for a specific survey type.

UtilityScan DF
GSSI UtilityScan DF

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Structurescan mini 3D
GSSI Structurescan mini 3D

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GSSI StructureScan Mini XT
GSSI StructureScan Mini XT

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