6
1.3.4 Model 4820 Earth Pressure "Jackout" Cell
Model 4820 Earth Pressure Cells are designed specifically for the measurement of soil
pressures on the back side of slurry walls. The pressure transducer housing is connected
directly and perpendicular to the thick back plate.
Pressure Cell
Transducer Housing
Instrument Cable
(4 conductor, 22 AWG)
Bottom View
Side View
6"
150 mm
Back Plate (with mounting holes)
5"
125 mm
(6 places, 6.75 mm ID)
Mounting Hole
Figure 8 - Model 4820 Jackout Pressure Cell
1.3.5 Model 4830 Push-In Pressure Cell
Model 4830 Push-In Pressure Cells are designed to be pushed in place for the
measurement of total pressures in soils and earth fills. The semiconductor pressure
transducer enables measurement of dynamic pressures. A thread is provided on the end of
the cell to allow for installation using lengths of pipe or drill rods.
Figure 9 - Model 4830 Push-In Pressure Cell
