Crackmeters and jointmeters are intended to monitor movement across surface cracks and joints in concrete structures or rock. The instrument assembly includes sensor housing and target, both parts are equipped with screw anchors. Typically the anchors are bolted on the opposite sides of the joint (crack). The displacement transducer housed in the sensor body is positioned across the joint/crack enabling to measure the changes in the distance between the anchors.

CRID is an integrated automatic system for fissure monitoring of building and monuments reducing the visual impact. The system consists of a set of four miniature electrical sensors (fissure meters), and a small size compact datalogger. CRID enables monitoring of up to four cracks with automatic data measurements and logging. The datalogger is housed in IP67 box and can store up to 43.000 measurements that can be easily downloaded to a portable PC by means of USB cable.

Technical specifications

Technical specifications
Linear potentiometer
Range  10, 25, 50, 100, 150 mm
Signal output 4–20 мА (current loop)
Power supply 12–24 V DC
Operating temperature –20 °C ... +60 °C
Body diameter 16 mm
Anchor distance 500 mm
Protection level IP68 (watertight up to  200 кPа)
Material  stainless steel

Vibrating wire linear transducers
Range 10, 25, 50, 100, 150 mm
Total accuracy < 0,5 % FS,
Signal output frequency
Operating temperature –20 °C ... +80 °C
Body diameter 16 mm
Anchor distance max 500 mm
Protection level IP68 (watertight up to 200 кPа)
Material stainless steel
Anchor distance <140 mm (25 mm), 160 mm (50 mm)
Operating temperature –20 °C ... +60 °C..