Wire crackmeter is designed to monitor changes in distance between two anchor points located at up to 30m. Typical applications include measurements of large displacement associated with landslides, monitoring of rock-masses, masonry cracks and surveying of earth faults. The wire crackmeter consists of a stainless steel transducer box and target assembly made by an eyebolt expansion anchor.
The electrical deformeter is used to monitor the displacement between two opposite surfaces and convergence in underground openings and tunnels. The displacement transducer is housed in a stainless steel body mounted on a fixing plate for wall/floor installation. A Kevlar rope forms the connection between the transducer and the target.
Technical specifications
WIRE CRACKMETER
Mechanical range 200mm
Electrical range 240mm
Sensitivity 0.03mm
Accuracy ±1mm (depends mainly from the thermal effects on the wire)
Repeatability ±0.03 mm
Signal output 4-20mA (current loop)
Operating temperature -20C +60C
Wire diameter 2mm, stainless steel
Max. wire tension 8kg
Base (wire)length Up to 30 meter distance between transducer and target
Transducer housing 300x200x185mm
Target assembly Eyebolt expansion anchor
WIRE DEFORMETER
Type of sensor Linear potentiometer or vibrating wire
Signal output 4-20mA, frequency
Measuring range 25mm (±12.5), 50mm (±25)
Resolution 0.01 mm (depending on readout)
Total accuracy ˂0.3% FS (4-20mA)
˂0.5%FS (vibrating wire)
Operating temperature -20C +60C
Wire Kevlar rope
Base (wire) length Up to 10 meter
Sensor housing 16mm diam