An Extensometer is a geotechnical monitoring instrument which is designed to help civil engineers and geologists in the measurement of the deformation of the rock mass and adjacent or surrounding soil.
Encardio-Rite, the world’s leading manufacturer and supplier of geotechnical instruments deal with Electrical, Magnetic, Digital, as well as, Mechanical Extensometers.
Model EDS-63U-D Mechanical Borehole Extensometer System is ideally suited for upward, downward or inclined boreholes. It measures the extension (displacement) which takes place with time in a borehole or in several boring holes in a rock mass.
Model EDS-64U-D Mechanical Borehole Extensometer System is suitable for 50 mm upward, downward or inclined boreholes. It is essential equipment for investigation and monitoring of foundations, slopes & embankments and for studying the behaviour of rock around underground cavities, tunnels and mines.Model EDS-70V Electrical Borehole Extensometer System and Model EDS-71V Electrical Borehole Extensometer System are designed to predict potential roof or wall fall before it actually occurs. Roof or wall fall in an underground cavity is almost invariably preceded by measurable sag as the strata open up and the movement usually occurs at an increasing rate as of fall conditions.
The Model EDS-91 Magnetic Extensometer System is designed to measure settlement or heave of the soft ground under the influence of loading or unloading due to the construction of embankments, fills, buildings, and structures.
The Model EDS-92 Soil Extensometer is used for monitoring the displacement between two surfaces that may shift with respect to each other with time. The soil extensometer finds major application in the measurement of lateral strains and settlement in or beneath the earth, rockfill embankments, and in dams.
Model EMA-11 Measuring Anchor/Rock Bolt Extensometer consists of a steel hollow anchor/rock bolt with a precise 4-point extensometer integrated into it. The measuring bars inside the hollow bolt have anchor points at each quarter of the total length so that the extension of the rock bolt and the corresponding forces can be determined.