Crack Meter

RST’s Crack Meters are designed to measure movement across surface cracks and joints.

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Overview

RST’s Crack Meters are designed to measure movement across surface cracks and joints. They are easily installed by grouting, bolting or bonding the two threaded anchors (with ball joints) or other mounts, on either side of the crack/joint, and then reattaching the anchors to the sensor.

Crack Meters are available in the following configurations:
-Vibrating Wire – 1D
-Vibrating Wire 2D and 3D models are custom.
-Submersible (up to 200 m) versions are also available (for example, on the upstream perimeter joint of CFRD dams).


VIBRATING WIRE SENSOR SPECIFICATIONS

ITEM SPECIFICATION
Range 25, 50, 100, 150, 200 mm
Accuracy 0.1% F.S.
Thermistor Type NTC 3K Ohms @ 25°C

Crack Meters are commonly used for:

  • Monitor crack separation or convergence, in concrete structures.
  • Monitor joints for movement caused by nearby geotechnical activity.
  • Alarm triggering when separation or convergence of two reference points reach a preset critical rate or value – requires use of data logger and RST’s GeoViewer Software.

View illustrations on how Crack Meters are used for:

1D ORDERING INFO (WITH GROUTABLE ANCHORS)

RANGES PART # COLLAPSED LENGTH
25 mm (1.0 in.) VWCM025 278 mm
50 mm (2.0 in.) VWCM050 311 mm
100 mm (4.0 in.) VWCM100 436 mm
150 mm (6.0 in.) VWCM150 564 mm
200 mm (8.0 in.) VWCM200 694 mm

 

1D SUBMERSIBLE ORDERING INFO: (WITH UNIVERSAL ENDS)

DESCRIPTION PART #
25 mm (1.0 in.) VWCM025S
50 mm (2.0 in.) VWCM050S
100 mm (4.0 in.) VWCM100S
150 mm (6.0 in.) VWCM150S
200 mm (8.0 in.) VWCM200S

File Name

Vibrating Wire Crack Meter Instruction Manual

Resource Type

Manual
Language Version Download
English EXM0036N

File Name

Crack Meters

Resource Type

Brochure
Language Version Download
English EXB0007S
Portugese EXB0049A

Speak with an Expert

I’m very happy with the quality of the instrumentation and technical support from RST, as always. They worked with us from the initial stages of the project to ensure that we were fully prepared and equipped to use the RSTAR network for the first time. They delivered everything within the tight project time frame to ensure that there were no delays on site, and the submersible tilt meters looked like new even after over twelve months of being submerged in Thames water!
 
-Richard Lipscombe, BEng (Hons), Director & Principle Consultant - RL Geotechnical Ltd