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August 6, 2021

Hilti PS 1000 X-Scan Review

GSSI Structure Scan Mini XT review

The PS 1000 X-Scan is a handheld GPR designed for use on concrete slabs to detect rebar and other features within the first 30cm of concrete. It has four small wheels and is operated in a sideways movement across a concrete surface. Internally it contains three GPR antennas, which allows it to have a very good shallow resolution and reliable performance.

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    As with the PS 200 S Ferrroscan and other small GPR of this kind, the X-Scan allows the collection of GPR data in a grid using paper to produce a map of any features detected.

    Unlike the original Ferroscan PS 200 S, the X-Scan is also able to see past the first layer to detect multiple layers of rebar, but it is not able to determine rebar diameters.

    The PS 1000 is a GPR or Ground Penetrating Radar, it works by transmitting a signal into the concrete slab and then listening for reflections which are recorded, because it has multiple antennas, it can simultaneously record data reflected at different angles, which gives it a very good resolution and reliable performance.

    A GPR signal is reflected by any change in the properties of the material it is travelling through (see our GPR training area for further information), this means that an X-Scan can be used to find almost any kind of object or feature which is buried in concrete.

    The raw GPR data can be displayed in real time, but the true outputs from the X-Scan are a real time data processing and migration view which shows a cross-section of the slab and is much easier to interpret than standard GPR data, and the 2D plan view which can be produced quickly on site.

    The X-scan should be able to detect any feature, metallic or non-metallic, including plastic and voids, buried in concrete to a depth of 300mm.

    The X-Scan is well made and we do not have doubts about its robustness, as with the PS 200 S Ferroscan it comes well packaged in a robust case. It is a large handheld GPR and it is quite heavy and cumbersome with respect to other GPR of this kind, but operation was straightforward.

    We tested the X-Scan outside our office on a simple concrete slab with the first row of rebar about 10cm deep, (the same slab we have tested other devices including structural GPR). The PS 1000 was a bit bulky for us and is limited to 1.2m scans, which is much more restrictive than any other GPR we have used. Although the migrated GPR data view worked well, we prefer to work with raw data and the unprocessed data view was poor. Shallow performance was good, but 300mm maximum penetration is too limited for us.

    The PS 1000 X-Scan is good choice of GPR if you are looking for a simple device to mark rebar locations on site and you are only interested in the first layer of bars.

    Unfortunately, this device is not suitable for us because the maximum scan lengths are too short, it is not possible to export data to post processing software, the useful penetration is to low, and the device is too bulky. We would recommend the use of a traditional GPR instead.

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