d-Micro Geotechnical Crackmeter

The d-Micro Crackmeter can be used for:

  • monitoring any individual or interface crack in a structure
  • monitoring cracks in underground mines such as lunch rooms and garages
  • monitoring cracks in parking garages
  • monitoring cracks in dams under rehabilitation
  • monitoring cracks in residential structures subjected to blast vibration and fracking vibration
  • monitoring bridge-deck behaviour
  • monitoring of pillars and posts


The d-Micro outputs readings directly in degrees C and microns which eliminates the necessity for expensive analog-to-digital conversion. Readings can also be made using the USB port of a laptop or tablet computer (SensorViewer). Long term, low power, data logging is possible using the low cost dLoggers. A Real-time plug-and-play network of d-micro sensors or of any combinations of any other YieldPoint Instruments can be built in minutes using the IoT Gateway or d-Mesh.

These features make solutions based on d-micro instruments extremely cost effective. d-micro can be easily installed and removed from all types of structures using convenient corrosion-proof nylon connectors


Range 10mm, Temp: -40 to 125 degrees C
Core Technology Eddy current transducer

Digital temperature sensor

Output Signal RS485 (9600,8,N,1) ASCII encoded signal comprising: Unique

Instrument _ID, Sensor_Type, Temp and

Displacement data

Display Resolution 1mm with hand held readout.
Display Linearity typically 0.5% F.S
Display Accuracy better than +/- 100mm absolute or 50mm relative.
Temp. coeff for displacement sensor <0.02%FS/o C (0-50 degrees C)