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Sunday, 25 September 2022
Continuous measurements by geodetic robots

Purposel: Extensometers are used to measure the relative displacements between two points; most commonly the change in length between the measuring head mounted at the surface and the root anchored in the borehole in the rock massif. The most common applications are the measurements of deformations around tunnel openings and monitoring of volume changes (settlement, expansion, ...) in structures foundations. You can use extensometers also in the case of hardly-accessible unstable rock slopes or waterworks objects. The reading of the deformation may be either manual or automated.

Description: The extensometer is composed of the head, rod and the root. The root is firmly attached to the rod, casing serves to enable free movement of the rod in the borehole. The rod extensometers can be mounted solely or several of them of different lengths in a single borehole. According to the terms you can use different types of roots (grouting, hydraulic, mechanical). The extensometric heads are of different constructions depending on the way of reading (mechanical measuring instruments, gauges, reading units, data-loggers, ...).

Motorized Zeiss DiNi
Accuracy of vertical displacements:

Measuring time for one point:

Compensation of  temperature influences:

Lighting of rods during night with integrated light:

Maximal distance:
0,2 mm at distances up to 30 m, otherwise 0,5 mm

approx. 15-30 seconds



up to 80 m
Toal station Leica
Measuring of position displacements:

Short measuring time:

Kompensation of temperature and barometric influences:

Maximal distance:
with accuracy up to 1,0mm



up to 1000 m

robot_nivelacny_pristrojRobotized leveling deviceautomatizovany_tachymeterAutomatized tachymeterrobotizovany_nivelacny_prisMonitoring of displacements of structures