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SISTER BAR REBAR STRAIN METER VWS-4000
Geosense

TOTAL EARTH PRESSURE CELLS

TPC-4000 series Total Earth Pressure cells are designed to measure total pressure (effective stress and pore water pressure) in soils and at the interface between structures and the wall of excavation.

Models 4010 and 4020 are designed to measure soil pressures on structures. They are fitted with an extra thick back plate on one side which is placed against the structure so as to avoid any warping of the cell. The other side has a thin plate welded to the back plate which provides sensitive measurement of soil pressures.

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Description

They are constructed from two stainless steel plates, welded around their periphery with the narrow gap between the plates filled with hydraulic fluid.

External pressure on the outside surfaces of the cell squeezes the two plates together creating an internal fluid pressure. A length of stainless steel tube connects the cell to a pressure transducer which converts the fluid pressure into an electrical signal which can be directly readout or transmitted to a data logging system.

Available with vibrating wire or 4-20mA signal outputs.

Additional information
Brands

Pressure Range

VWTPC 345kPa – 20.7MPa; SGTPC 100 kPa – 3.5MPa
Over range

150% FS
Resolution

± 0.025% FS, Infinite
Accuracy

± 0.1% FS
Linearity

<0.5% FS
Outer diameter

165, 245, 320mm
Active diameter

150, 230, 305mm
Operating temperature

-20°C to +80°C; -30°C to +95°C
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About brand
Geosense Ltd is one of Europe’s leading manufacturers and suppliers of instruments to the geotechnical, civil engineering, mining and environmental industries. Geosense products are used globally in major projects in more than 68 countries. With a comprehensive in-house design and manufacturing capability, we can provide products not only to tight deadlines but also to suit custom-engineered solutions for specific project requirements. Geosense specialises in the manufacture of vibrating wire and MEMS sensors, which are used to produce a wide range of instruments. In addition we manufacture automated data acquisition systems to complement our sensors, including wireless systems.
Data Sheets

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