What is GPR/Pulse Radar? How does it work?

GPR (Ground Penetrating Radar) is a radar-based technology that uses antennas to transmit and receive pulses of electromagnetic energy through a medium such as the ground or concrete. As the radar receives the transmitted pulses it registers “echoes” from objects based on their different electromagnetic conductivity.

A simple illustration of the principles is shown below.

When the Hilti PS 1000 X-Scan is moved along a concrete surface, electromagnetic waves are reflected from objects beneath this surface. These objects are indicated immediately on the display.


faq-1b-imageThis technology can be used to scan various types of materials such as ice, rock, soil, asphalt or concrete depending on the transmission frequency. This makes the technology suitable for use in fields such as geology archaeology, mining, military applications, security and concrete inspection.

This Hilti PS 1000 is designed to be used for concrete inspection only.

Do GPR emissions present a health hazard?

GPR emissions do not present a health hazard to the operator or persons nearby. The system should not be used, however, by persons with a heart pacemaker or by pregnant women.

Which objects can your scanner detect?

The Hilti PS 1000 X-Scan can detect all kinds of metal objects (such as rebar, tendon cables, copper or aluminum pipes, etc) and non-metal objects (such as wood, air cavities, plastic, electrical conduits, glass-fiber cables, etc) embedded in concrete. It can also detect objects in multiple layers, depending on the condition of the concrete, rebar mesh spacing, object size and depth. It can also indicate slab thickness.

How many layers can be seen with your scanner?

The Hilti PS 1000 X-Scan can detect multiple layers of objects embedded in concrete. Depth measurement performance and layer detection ability, however, is affected by certain limiting factors. These include concrete permittivity or density, rebar spacing, the material from which the embedded objects are made, and their depth and size.

Can your scanner locate electrical conduits and clearly identify them?

Yes, the tool can locate electrical conduits (PVC or metal), but it cannot identify the material class. Only the object layout, approximate depth, geometry and position of the conduit can be identified. The Hilti PS 1000 X-Scan has been designed to locate objects , not to identify object class (material).

Elevator Shaft - Current View 2D

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