Settlement Sensors
Borehole Type Settlement Sensor
The Model 4600 Borehole Type Vibrating Wire Settlement System is designed for the remote measurement of surface or subsurface settlement in fills, surcharges, dams, embankments, etc. A borehole is drilled which allows a pressure transducer to be anchored to solid ground below the area of settlement. A fluid filled tube extends upward connecting the transducer to a reservoir which is located in the moving strata or fill. The measurement of fluid pressure indicates the elevation difference between the sensor and the reservoir. This design eliminates the need for long liquid filled tubes.
| Specifications | |
|---|---|
| Standard Ranges¹ | 7, 17, 35 m |
| Resolution | 0.025% F.S. |
| Sensor Accuracy² | ±0.1% F.S. |
| Temperature Range | −20°C to +80°C |
| Length × Diameter | 305 × 60 mm (reservoir), 280 × 60 mm (sensor) |
¹Other ranges available on request.
²Laboratory accuracy. Total system accuracy is subject to site-specific variables.