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Cross Hole Ultrasonic Monitor

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Welcome to Piletest!
The CHUM (Cross Hole Ultrasonic Monitor) uses the Crosshole Sonic Logging (CSL) method to perform high-resolution quality control of deep foundations by crosshole test.

Füllen Sie bitte dieses Formular aus

Vielen Dank!

The system uses an ultrasonic wave sent from a transmitter to a receiver pulled through water-filled access tubes embedded in the concrete. The measured arrival time and energy are strongly dependent on the concrete quality. This is the basics of the crosshole test method.

Additional methods supported by the CHUM are:

  • Single Hole Ultrasonic Testing (SHUT) 

  • Tomography (2D and 3D tomography) measurement and visualization.


The CHUM is fully compliant with ASTM D6760 - 16, AFNOR NF P 94-160-1.

The main CHUM advantages 

  • Easy to use

    • Usually, no training is needed, and the system can be self-taught in hours. (No expensive training days)

"we are lucky to have the CHUM, easy to use, get the results, and explain to client/consultant. " - Manila, Philippines 2022,

when buying his second CHUM after 14 years of use


  • Tomography

    • 2D tomography (included).

    • 3D tomography provided as a service

    • Three alternative tomography methods: Fuzzy logic, Parametric and 3D

    • In real-time tomography: the shape of the defects forms as the probes are pulled

  • Modular design

    • CHUM connects to any PC via the standard USB port. It will connect to future computers (such as Origami) while embedded systems will quickly become outdated.

  • Reliable

    • 100% QA tests at 16-atmosphere pressure, vibration and extreme temperature

    • The CHUM case can tolerate drops and shocks

    • 3 years warranty!

    • Rugged connectors, PU cables, and details.

"The CHUM operated perfectly in -17°c Moskow


  • Devoted service

    • Free software support and updates (included)

    • Analysis, interpretation, and reporting assistance (included). We will do/review your first reports to make sure they are up to the highest standards.

    • We also offer SOS (Second Opinion Service) support.

  • Performance

    • Up to 150m (450') deep (deeper optional)

    • A clean signal on 3m and more on solid concrete

    • The cleanest signal in the industry

  • High productivity

    • One experienced person tests about 700m of sections per hour!

    • 40 samples/sec: test as fast as 2m/sec !

    • Fully automated reports in MS WORD format

    • The whole system fits into carry-on luggage. (50m cable drums)


"We just tested 4000m of CSL sections in one day!" - Middle east

  • Unlimited software licenses 

    • No plugs, no registration, no need to type in long product ID, no "software transfer fees".

    • Install the fully functional software as many times as you need. Limited

18 Fouracres Walk
Hemel Hempstead
Herts HP3 9LB
United Kingdom

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