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Pressure Cells

Jackout Type (VW) | Model 4820

  • Model 4820 Jackout Pressure Cell.
  • Model 4820 Jackout Pressure Cell shown in hydraulic ram assembly, with piezometer.
Model 4820

The Model 4820 Jackout Pressure Cells* are used to measure earth pressures on slurry walls. They are designed to fit inside a plate which is pressed against the side of a slurry wall excavation using a hydraulic jack arrangement. This method of installation ensures that the jackout cell is located with its sensitive face in contact with the adjacent soil. The two photos at right show the Jackout Pressure Cell separately, as removed from the assembly, and the complete Jackout Pressure Cell Hydraulic Jack Assembly (with piezometer installed to measure pore water pressures).


Standard Ranges¹
350, 700 kPa; 1, 2, 3, 5 MPa
Over Range
150% F.S. (maximum)
0.025% F.S.
±0.1% F.S.
Temperature Range¹
−20°C to +80°C
Height × Diameter¹
12 × 150 mm

¹Other ranges and sizes available on request.

²Transducer accuracy established under laboratory conditions.
Total system accuracy (pressure transducer + pressure cell) is subject to site-specific variables.

*Please Note: Models are also available (3500 Series) with semiconductor pressure transducers to enable measurement of dynamic pressures (please contact GEOKON for details).

Please Note: GEOKON maintains an ongoing policy of design review and reserves the right to amend products and specifications without notice. Various instruments are discontinued over time and replaced with new, updated models.