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Joint meter mod. DS810
Designed for measuring displacement between two points. Therefore they are used for monitoring cracks or joints in structures or rocks.





   
   
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Wire joint meter mod. DS820
measures relative displacement between two points placed horizontally or vertically at a distance not less than 0.5 mt and no more than 15 mt. An invar wire (material with low thermal coefficient) is connected by one end to the displacement sensor and on the other end to a special bolt and it is tended by a spring and protected by a wrinkled tube.


   
   
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Multipoint borehole extensometer mod. DS830
Measures the variation displacement between to points: the anchor placed at depth and the head placed at surface. They can have a single or several rods (from 2 to 6 measuring bases). The measuring head is produced entirely in stainless steel. The rods (invar, stainless steel, fiberglass), which connect the anchors to the measuring head, are inserted into a sliding protective tube.

   
   
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Fixed extrusometer mod. DS840
Designed to measure the excavation face in tunnels during excavation procedures. It consists of an anchor and a measuring head placed at a different depth. In the measuring head are placed a displacement sensor DS810 with a range of 200mm and a radio transmitter.


   
   
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