The Model 4800 Earth Pressure Cells are designed to measure total pressure in earth fills and embankments.
All cells consist of two circular stainless steel plates welded together around their periphery and spaced apart by a narrow cavity filled with de-aired oil.
Changing earth pressure squeezes the two plates together causing a corresponding increase of fluid pressure inside the cell.
A vibrating wire pressure transducer converts this pressure into an electrical signal which is transmitted to the readout location.
Features
Proven and reliable vibrating-wire technology
Wide variety of pressure ranges and configurations
Automatically provides total soil & water pressure
Heavy-duty instrumentation cable pre-installed
Excellent stability for long-term measurements
Stainless steel construction resists corrosion
Applications
Bridge abutments
Retaining walls
Sheet piling
Tunnel linings
Pile tips
Specifications
| Standard Ranges |
70, 170, 350, 700 kPa; 1, 2, 3, 5, 7.5, 20 MPa |
| Over Range |
1.5 × rated pressure |
| Resolution |
0.025% F.S. |
| Accuracy |
±0.1% F.S. |
| Temperature Range |
−20°C ila +80°C |
| Height × Diameter |
6 × 230 mm |