Depth Tracking Unit (DTU)

Using a combination of Hookload Sensor and a Rotary Encoder, the Depth Tracking Unit automatically tracks bit depth in drilling applications. The unit is designed to be directly compatible with the Geolink system, but may be operated independently as part of other MWD/LWD surface systems.

As a supplementary function, the unit also provides Instrinsically Safe power and serial communications for rig floor tool configuration and download.

  • Rotary Drawworks or Geolograph input
  • Hookload pressure Tx or Line Tensiometer
  • Modular package - maintenance ease
  • Robust transportation case
  • Bright display and entry pad
  • Instrinsically Safe tool communications
  • Drawworks layer compensation
  • Advanced In/Out Slips algorithm
Value Units Comments
I/O Peripheral Alphanumeric Keypad
Input Transducers Hookload Pressure Transducer 4-20mA – See note 1
Draworks Rotary Transducer Quadrature
Output LCD Display
Serial Communications
Functions Depth Tracking
Remote Serial Communications
Value Units Comments
Operating Voltage 110 – 240 VAC (50/60Hz)
Hazardous Area Protection IS Circuits Intrinsically Safe barriers used for all Hazardous Area connections
Interfaces 2 x Serial RS-232 SIB Comms/Rig Floor Tool Comms
Value Units Comments
Operating Temperature -20 to 50 °C
-4 to 122 °F
Storage Temperature -20 to 70 °C
-4 to 158 °F
Vibration 5 g rms 50 – 1000Hz


  1. Clamp Line Tensiometer option also available
Depth Tracking Unit

We provide a responsive repair, calibration and product support service. Our highly experienced and knowledgeable personnel are available to troubleshoot or repair equipment, and provide general product technical assistance.

If you need effective sensor support for your business contact for more information.