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The Piletest PSI parallel seismic instrument for pile foundations


PSI uses the well-known Parallel Seismic method to establish the length of existing foundations (specifically for a pile or deep foundations) where the superstructure  (i.e. existing building) precludes access to the pile heads.
It is sometimes the only pile integrity test that can be performed.

  • For making reuse of old piles

  • Easy to run test 

  • Measures only the pile length under a structure 

  • Standard compliant with

    • AFNOR NF P94-160-3

    • ASTM D8381-21



The test requires the installation of a plastic access tube in parallel and as close as possible to the tested pile. The tube should be carried down to a depth exceeding the assumed pile length by a margin of 8-10 meters and filled with water.

In unsaturated soil the tube should be firmly grouted in the hole to achieve good coupling with the surrounding soil.

When sustainability requires old pile reuse, PSI offers a way to measure what pile length is real there

The Piletest symbol of quality


  • Specially designed and tested for a hostile construction environment.

  • 3-year warranty!

  • 10 years free software

  • Rugged connectors, cables & sensors

The Piletest symbol of great features

Easy to Use

The Piletest symbol of high performance

Top Perfromance

  • Highly sensitive acoustic sensors 

  • Check any pile length up to 50m in less than 20 minutes

  • Test all types of piles

  • Weighs under 10Kg

PSI - Technical Specifications







Temperature range



Sensor: Rugged metal case

Instrument: Rugged, Environment-proof

210W x 140L x 40H (instrument only)

6.0 kg (instrument with 50m cable)

0.8 kg (instrument only)

13.0kg (Typical shipping)

Operating : -25°C to 50°C

Storage : -40°C to 70°C

90% (non-condensing)

Sensor: Waterproof to 5ATM

Instrument: IP62, 90% condensation (light rain)



USB cable, from computing device


ASTM D8381-21

AFNOR NF P94-160-3

Meets or exceeds





Sample rate 
Depth accuracy 

100Hz ~ 4kHz in stainless enclosure.

25 mm diameter

Heavy-duty polyurethane on reel.

50kHz (20μS resolution)

16bit A/D + 14 gain levels = 30bit dynamic range .

3mm resolution <0.1% error.


Pile length


Memory Storage

10-15 min (depending on pile length) per pile





Arrival time vs. depth

Pile tip depth

Wave speed in the pile

Multi-lingual report generation in MS Word format


Computer (Minimum)

Windows Win7/Win10/Win11.

Screen resolution 1280 x 1024 min.

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3D Tomography

3 Dimensional Tomography

While normal (1D) CSL can only show the depth of an anomaly, tomography can help in the visualization of the shape, size, and location of anomalies. It is an analysis and presentation method of captured CSL data, that projects the logged results into two dimensional (2D) plane or three dimensional (3D) body. 

The Piletest crosshole ultrasonic monitor - CHUM,  CSL


Cross Hole Ultrasonic Monitor

The CHUM uses the Crosshole Sonic Logging CSL testing method to perform high-resolution quality control of deep foundations. It is used mainly for large-size deep pile foundations, where pile integrity tester like PET is not suitable.

The Piletest wireless pile integrity tester PET

PET Bluetooth

Pile Integrity Tester
PET is used to test the integrity of deep pile foundations. PET Uses the pulse-echo method (PEM) for pile integrity testing (PIT). A pile test starts when the pile top is struck with a hammer, and the PET accelerometer records the reflected waves, which are displayed as a reflectogram.

  • 12345678 Example Accessory #4
    This is example accessory #4 description.
  • 12345678 Example Accessory #2
    This is example accessory #2 description.
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