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Electric crack meter

The electric crack meter is used for the continuous measurement of the evolution of the structural opening joints, cracks and construction joints in concrete.

The tool is constituted of a cylindrical body inside which is housed the displacement transducer and a sliding rod connected to the same transducer translates the movements (widening or narrowing) of the slot to be monitored into an electrical signal.

The two ends of the sensor are fixed, by means of blocks, straddling the same crack.

It can have different measuring ranges depending on the type of application.

To evaluate the three-dimensional movement of the crack, you can install the crack meter arranged in three main directions. (x-y-z).


  • Type of sensor: linear potentiometer
  • Resolution: virtually infinite
  • Accuracy: +/- 0,01% FS
  • Output signal: 0-5 VDC, 4-20 mA (with signal converter)
  • Operating temperature: -30° C + 100° C
  • Material: stainless steel AISI 304
  • Protection class: IP 67


measuring range (mm) 25 50 100 150
resistence (kW ) 1 2 4 6
maximum power supply Voltage (V) 20 40 60 60
compressed length (mm) 200 275 360 475
extended length (mm) 225 325 460 625
body diameter (mm) 16
head diameter (mm) 8
material AISI 304
weigth (gr) 125 185 270 350
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