Grant dataTaker® DT8x Series Geotechnical Data Loggers

The dataTaker® GeoLoggers can monitor a wide variety of geotechnical  datalogging applications including slope stability, subsidence, dam wall  monitoring, tunnel and mining excavation, ground water, tunnel wall  monitoring and site assessment.

The advanced new dataTaker DT8xG range of GeoLoggers are compatible with  all major brands of geotechnical instrumentation including Slope Indicator, RST Instruments, Geokon, Soil Instruments, Roctest, AGI -  Applied Geomechanics Inc.

  • DT80G 5-15 unversal inputs
  • DT85G 16-48 universal inputs
  • DT85GM 16-48 universal inputs including built in modem
  • Expandable Analogue channels using CEM20. DT80G up to 100 and DT85G up to 300 geotechnical channels


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dataTaker® DT80G

The low cost, low power dataTaker® DT80G is extremely versatile and  easy to configure for communications, data capture and data analysis.  View the data in real time or store up to 5 million data points. Data  storage and retrieval can be achieved via USB memory stick, FTP, cell  phone, Modbus for SCADA, Ethernet or Web.

The dataTaker® DT80G has 5 analog channels capable of measuring up to  5 vibrating wire strain gauges with thermistors or 15 vibrating wire  strain gauges without thermistors.

  • 5 Four wire Isolated/10 Two wire Isolated/15 Two wire common reference
  • With 5 x CEM20's connected 100 Four wire Isolated/200 Two wire Isolated/300 Two wire common reference

dataTaker® DT85G

The low cost, low power dataTaker® DT85G is extremely versatile and  easy to configure for communications, data capture and data analysis.  View the data in real time or store up to 10 million data points. Data  storage and retrieval can be achieved via USB memory stick, FTP, cell  phone, Modbus for SCADA, Ethernet or Web.

The dataTaker® DT85G has 16 analog channels capable of measuring up  to 16 vibrating wire strain gauges with thermistors or 48 vibrating wire  strain gauges without thermistors.

  • 16 Four wire Isolated/32 Two wire Isolated/48 Two wire common reference
  • With 15 x CEM20's connected 300 Four wire Isolated/600 Two wire Isolated/800 Two wire common reference

dataTaker® DT85GM

The dataTaker® DT85GM is a robust, stand alone, ultra low power data  logger with an integrated 2G/3G modem designed for the geotechnical and  construction industries.

The dataTaker® DT85GM has 16 analog channels capable of measuring up  to 16 vibrating wire strain gauges with thermistors or 48 vibrating wire  strain gauges without thermistors.

  • 16 Four wire Isolated/32 Two wire Isolated/48 Two wire common reference
  • With 15 x CEM20's connected 300 Four wire Isolated/600 Two wire Isolated/800 Two wire common reference

Supporting vibrating wire sensors the new dataTaker® DT8xG GeoLogger  is  ideal for all geotechnical data logging applications. The dataTaker®   GeoLoggers have built-in vibrating wire support providing ideal data   acquisition and monitoring solution for the engineer working in the   geotechnical environment.

The DT80G and DT85G can be expanded  simply by connecting dataTaker®  Channel Expansion Modules (CEM20) to  provide 100 to 300 vibrating wire  channels with thermistors.

Key Features

  • Standalone data logger with link to a PC
  • Dual channel isolation technology
  • User definable allocation of memory size and mode
  • Vibrating wire support
  • Expandable to 800 universal analogue channels - 300 Geotechnical channels (with CEM20's attached to a DT85G)
  • 8 digital input/output channels
  • 12 counter inputs (4 high speed) and 2 phase encoders
  • Calculated measurements
  • SDI-12 (multiple networks)
  • 2 serial 'smart sensor' ports
  • Modbus for SCADA connection
  • Memory of approximately 10 million data points
  • FTP for automatic data transfer
  • Web Interface

Analogue inputs supported

  • Thermistors
  • Thermocouples
  • PT100/PT1000
  • Voltage
  • Current
  • Resistance
  • Frequency
  • Vibrating wire sensors (Iclinometer/Extensometer/Piezometer/Pressure cell/ Crack meter/Tilt meter)
  • Bridge connections (Strain gauges/Load cells)

Key Capabilities

  • Create complex schedules of logging rates, triggers and alarm outputs
  • Scale and view readings in real time on the integral display or on a PC running Delogger or Excel
  • Display readings in preferred engineering units e.g. Hz, Bar, Pascals, Nm etc.
  • Select logging rates
  • Derive calculated (virtual) channels from real input channels using mathematical functions
  • Concurrently sample channels at different sample speeds
  • Measure recordings from vibrating wire sensors such as Iclinometer,  Extensometer, Piezometer, Pressure cell, Crack meter and Tilt meter

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