Folowrd’s convergence meter is used to measure the accurate amount of the displacement between two points in the structure. This production’s unique design able it to measure the smallest amount in the most accurate way. Also our company is proud to declare that this meter has been improved in many ways to make it easier to work with. Convergence meters by Folowrd are very accurate instruments which are suitable as a measure tool to determine movements of tunnels and cavern walls.  the resolution of this tool can be improved according to customer orders.

Benefits of this equipment:

  • It is easy to use
  • The tape is punched and because of that if it will be changed there is no need for calibration
  • It can work in the environment that is -20 C up to +60 C • The work environment humidity is about 80% (noncondensing)
  • Using a digital micro meter
  • Real accuracy 0.1 mm in 30 m
  • Applications:
  • Tunnels
  • Mines
  • Caverns

Technical Spesifications

Tape Length Tape Traction Accuracy Battery Battery Functionality weight Length
15,20,30 up to 50m 10 kg 0.01mm 3V 1 year 2kg 550mm
Electronical LVDT Head characteristic
Sensor type LVDT
Typical non-linearity ± 0.1 .. ±0.08 depend on Measuring range
Resolution 0.1 … 0.001 mm depend on Measuring range
Total accuracy (linearity+hysteresis+repeatability) <±0.09% FS
Repeatability <0.01% FS
Supply voltage 24 VDC
Storage temperature -55  ……+90 °C
Operating temperature -40  …….+125 °C
Logger and Display Compatible with RUD600,RUD400
Communication interface RS485
Enclosure IP68
Load Cell