Multipoint Vibrating Wire Piezometer

Multipoint Vibrating Wire Piezometer

The SISGEO Multipoint Vibrating Wire Piezometer by Sisgeo is designed to measure pore-water pressure at multiple levels within a single borehole. Ideal for geotechnical and structural monitoring, this high-performance sensor offers reliable, accurate pressure readings at different depths, making it perfect for assessing soil and water pressures in Dams and fill embankments, Deep excavation, Landslides monitoring. Built for durability and ease of installation and is an essential tool for projects requiring multi-level pressure monitoring.

Working Principle:

The Multipoint Vibrating Wire Piezometer operates on the principle of vibrating wire technology. It consists of a vibrating wire sensor, which is placed within a pressure chamber. When pore-water pressure is applied to the piezometer, it causes a deformation of the diaphragm within the pressure chamber.

This deformation affects the tension in the vibrating wire, altering its frequency of vibration. The vibrating wire is excited by an electromagnetic coil, and its frequency is directly related to the applied pressure.

A readout device measures the change in frequency, which is then converted into a corresponding pressure value. The piezometer can be equipped with multiple levels of sensors to measure pore-water pressure at various depths within the same borehole, providing a comprehensive profile of pressure changes in soil or rock strata. This method ensures highly accurate, stable, and long-term monitoring of pore-water pressure in geotechnical and structural applications.

Typically, the user should select bill of materials based on deployment scenario:

1. Vibrating Wire Sensor: This is the core component that detects changes in pore-water pressure.
2. Filters: For soil and water filtration, specific to the conditions of the installation.
3. Data Logging Interface: This is the interface that allows the piezometer to connect with compatible data loggers for data collection and monitoring.

• MIND Portable Readout: A compact, multichannel readout unit for local readings of Sisgeo instruments.
• CRD-400 READOUT: CRD-400 is a new generation multipurpose readout designed to take readings of all instruments including vibrating wire.
• WR-Log Wireless Node: Wireless data transmission and remote monitoring through the node.
• OMNIAlog Datalogger: Centralized data collection for remote monitoring and analysis.

Applications of Multipoint Vibrating Wire Piezometer

• Measurement of ground water pressure at different elevations
• Monitoring soil consolidation activities
• Dams and fill embankments
• Landslides monitoring
• Natural or cut slope sites
• Deep excavation