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CPT-Logger Digitizer

Digital CPT-logger

The digital CPT-logger is the heart of the data acquisition system for geotechnical and environmental testing procedures, such as cone penetration testing (CPT). It is to be used in combination with a standard laptop or industrial computer and data acquisition software, such as a CPT-Explorer. You can order this innovative product at Gouda Geo-Equipment.

The functionalities of our digital CPT-logger

The digital CPT-logger combines the following functions:

  • It supplies power to the attached electric cones, measuring heads, adapters, and alike
  • It digitizes the incoming analogue signals
  • It conditions the incoming digital signals from independent components (e.g. the depth synchronization)
  • It synchronizes all data for processing on attached computer

The CPT-logger is compatible with all electrical CPT cones (both compression and subtraction type), electrical measuring heads, environmental modules and a magnetometer. The high-grade waterproof housing makes the unit extremely suitable for working in the field, the compact design assures the use of little space.

Our CPT logger processes up to twelve data signals

It processes simultaneously up to eight analogue and four digital data signals, such as:

  • Cone resistance ● Local sleeve friction ● Inclination ● Pore pressure ● Temperature ● Penetration depth ● Date and time ● Fuel fluorescence ● Electrical permittivity ● Electrical conductivity ● Redox potential ● Acidity (pH)

The digital CPT-logger is provided with Cone-ID© for automatic recognition of the connected cone, measuring head, and alike. This CPT system only functions with cones and measuring heads provided with Cone-ID© features and CPT-Explorer data acquisition software. The CPT-logger is suitable for mechanical and electrical CPT testing in accordance with the relevant national and international standards.

Explore the possibilities of this innovate logger

Are you interested in our digital CPT logger and do you want to add this to your collection of geotechnical instruments? Please contact us by calling (0)715 318 475 or send an email to The experienced professionals Dutch CPT company will gladly tell you more about this system and are available 24/7.

  • Dimensions (L x W x H): 240 x 175 x 70 mm
  • Weight: 1,600 g
  • Ingress protection: IP68
  • Power supply: 12 to 24 Vdc. 110 and 230 Vac is possible with additional adapter
  • Intergrated circuit breaker
  • Analogue signal input: 8 channels
  • Digital signal input: 4 channels
  • A/D conversion: Dual slope
  • Digital resolution: 24 bits
  • Output port: RS232 or USB (select at order)
  • Power supply to cone: ± 15 Vdc (max. 25 mA)
  • Analogue input signal: ± 10 Vdc
  • Sampling rate: 10 ms/channel
  • Operating temperature: 0 to 60ºC
  • Storage temperature: -30 to 85ºC
  • Humidity: 5 to 100%
  • Vibration resistance: < 500 Hz at 1 G
  • Shock resistance: 10 G peak (10 ms duration)
  • Input protection: 70 V (peak to peak)
  • Input impedance: 80 k parallel 10 nF
  • Calibration accuracy: 50 ppm ± 1 count
  • Long-term drift: 20 ppm/1000 hours
  • Temperature drift: 50 ppm/ºC