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The GPC is the PDA system from Piletest. It is the next generation of dynamic pile testing systems, designed with simplified software and higher ease of use than incumbent systems. Professor George G. Goble, the pioneer of dynamic pile analyzers, designed the GPC system. 


  • Lossless Wireless Transmission.

  • Comboducer – Strain gauge + Accelerometer transducers combined in one sensor. Prevents nonvertical accelerometer mounting (common with the incumbent system) with fewer bolts.

  • Eight channels - Dual GPC systems for four Comboducers or a Single GPC with averaging cables.

  • ASTM D4945 Standard compliant.



You only need to connect two Comboducer (dual-purpose) sensors to test a driven pile dynamically while it is being hammered into the ground. The system main unit can be attached to the pile under test and sends all the monitored data to your computer via lossless wireless communication. This concept makes the construction site work much easier and faster to operate. To measure the four sides of a pile, you can use two main-unit systems simultaneously with a dual WiFi connection computer.

Easy to Operate Dynamic Pile Testing, with Intuitive Software and Combo Sensors (Comboducers) 


  • Lossless wireless communication - 100% reliable wireless connection.

  • The GPC main unit was designed to tolerate the harsh pile driving conditions. Watch

  • 3-year warranty!

  • Rugged connectors and sensors

Easy to Use

  • Single sensor for two transducers, with Comboducer = Accelerometer +

        Stain Gauge 

  • One operator can handle the lightweight GPC system.

  • Easy and Simple to use software. 

Top Perfromance

  • Dual channel lossless WiFi connection

  • N_GAPA - Top-notch Automatic Pile Analysis software for signal matching analysis, proven to be equal to and faster than CAPWAP

  • Real-time analysis of non-uniform piles in the field

GPC- Technical Specifications






Temperature range




Industrial grade DAC enclosed in a durable aluminum housing.

82 mm x 108 mm x 280 mm (Ver 1.4)

1.9 Kg (Ver 1.4)

10.0 Kg (Typical shipping)

Operating : -20°C - 55°C

Storage :     -40°C - 80°C

90% (non-condensing)


Sensor: IP62, 90% condensation (light rain)

Main unit: IP61, Protected from condensation





Rechargeable Lithium Ion battery, 2 hours charge time 

(Supports a full day of typical use 5-8 hours)

100-240V AC Charger


ASTM D4945

EN ISO-22477-10

Meets or exceeds




Cable (optional)


Strain gauge:










Sampling Frequency

Sampling Resolution

WiFi - 802.11ac

Standard CAT5 RJ45 an optional replacement for Bluetooth


0.5 µε

500 µ/mV/V Nom. 


-3600 µε- +3600 µε


0.01 g 

0.060 mV/g Nom. 


-2000 g - +2000 g 

10 KHz - 50 KHz 



Pile lengths


Pile Type



Unlimited (Concrete, Steel, Timber)

Any non-uniform piles 




Produced on office PC, including

Pile Details & CASE Method
Signal Matching Summary and Extrema Results
Static Load Test Simulation
Node Map


Computer (Minimum)

Microsoft Windows OS Win 7 /Win 10/ Win 11 

1366x768 resolution or better 

USB port 
WiFi 802.11ac

Recommended for BYOD: Tablet PC (outdoor display)

Other Customers Also Purchased

N_GAPA main_edited.jpg


Pile Driving Analysis (PDA) software 

It is the next generation of automatic pile analysis software for dynamic pile testing, comparable to and better than CAPWAP. It estimates the total bearing capacity of a pile or shaft, as well as resistance distribution along the shaft and at the toe. It is  super-fast.



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 unsuitable.

PET_with_Android offwhite back-2.jpg

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