Description
Model: EDS-71V / EDS-71P
The EDS-71V and EDS-71P are single-point borehole extensometers designed for precise measurement of ground and rock deformation. These instruments are widely used in geotechnical investigations and monitoring of tunnels, foundations, slopes, embankments, underground caverns, and landslide zones.
They are engineered for installation in standard 50 mm diameter boreholes, making them adaptable for most field conditions.
Each extensometer incorporates a vibrating wire displacement transducer, providing long-term stability and accurate readings even in harsh environments. The system’s design enables reliable performance at remote or hard-to-access locations.
Specifications
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Instrument type: Single-point Borehole Extensometer
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Sensor type: Vibrating wire
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Configuration: Single measuring point with integrated VW displacement sensor
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Application: Monitoring deformation or movement in soil and rock masses within tunnels, foundations, deep excavations, mines, slopes, etc.
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Measured parameters: Displacement / settlement / heave
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Measuring range: 50 mm, 100 mm, 150 mm
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Testing & Calibration: Thermal cycling (-20 °C to +80 °C), thermal response verification, accuracy testing, and waterproof verification (for WP version)
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Key features: Compact design for 50 mm boreholes; suitable for difficult-to-reach monitoring points
