Model 4500S,
4500AL(V) Standard Piezometers
The Model 4500 Standard Piezometer is designed
to measure fluid pressures such as ground water elevations and pore
pressures when buried directly in embankments, fills, etc. Also for
installation inside boreholes, observation wells and standard (>19
mm diameter) piezometer riser pipe. The Model 4500AL is designed for
low-pressure ranges. The vented version (ALV) provides automatic compensation
for barometric pressure changes. Thermistors are included to measure
temperatures.*
| Specifications | ||
| Standard Ranges | (S) |
350,
700 kPa; 1.0, 2.0, 3.0, 5.0, 7.5 MPa 70, 170 kPa |
| Over Range | 2 x rated pressure | |
| Sensitivity | 0.025% F.S. (minimum) | |
| Accuracy | ±0.1% F.S. | |
| Linearity¹ | < 0.5% F.S. (±0.1% F.S. optional) | |
| Temperature Range² | –20°C to +80°C | |
| Length x Diameter | (S)
|
133 x 19.1 mm 133 x 25.4 mm |
| ¹±0.1%
F.S. option available in some ranges. |
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Model 4500B,
4500C Small Diameter Piezometers
These piezometers are uniquely designed to enable
the automation of small diameter non-standard piezometer standpipes.
The 4500B will fit inside 19 mm pipe and the 4500C will fit inside 12
mm pipe.*
| Specifications | ||
| Standard Ranges | (B) |
350,
700 kPa; 1.0, 2.0, 3.0, 5 0, 7.5 MPa 350, 700 kPa |
| Over Range | 2 x rated pressure | |
| Sensitivity | (B) (C) |
0.025% F.S.
(minimum) 0.05% F.S. (minimum) |
| Accuracy | ±0.1% F.S. | |
| Linearity¹ | < 0.5% F.S. | |
| Temperature Range² | –20°C to +80°C | |
| Length x Diameter | (B) (C) |
133 x 17.5 mm 165 x 11 mm |
| ¹±0.1%
F.S. option available in some ranges for the 4500B only. |
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Model 4500DP
Drive Point Piezometers
The Model 4500DP Drive Point Piezometer has the
transducer located inside a housing with an EW drill rod thread and
removable pointed nose cone. When threaded onto the end of EW drill
rods, the unit can be pushed directly into soft ground with the signal
cable located inside the drill rod. This model is ideally suited for
use in soft clays and landfills. The piezometer may be recovered at
the end of the job. Models are available that are similar in construction
to the 4500DP but which use metric threads allowing for installation
using conventional cone penetrometer or other drill rods with adapters.*
| Specifications | ||
| Standard Ranges | 70, 350, 700 kPa; 1.0, 2.0, 3.0, 5 0, 7.5 MPa | |
| Over Range | 2 x rated pressure | |
| Sensitivity | 0.025% F.S. (minimum) | |
| Accuracy | ±0.1% F.S. | |
| Linearity | < 0.5% F.S. (±0.1% F.S. optional) | |
| Temperature Range¹ | –20°C to +80°C | |
| Length x Diameter | 187 x 33.3 mm | |
| ¹High temperature versions available on request. |
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Model 4500HD
Heavy Duty Piezometer
The Model 4500HD Heavy Duty Piezometer is designed
for direct burial in fills and dam embankments. The 4500HD is used in
conjunction with heavily armored cable to withstand earth movements
during construction. Recommended for use in earth dams.*
| Specifications | ||
| Standard Ranges | 70, 350, 700 kPa; 1.0, 2.0, 3.0, 5 0, 7.5 MPa | |
| Over Range | 2 x rated pressure | |
| Sensitivity | 0.025% F.S. (minimum) | |
| Accuracy | ±0.1% F.S. | |
| Linearity | < 0.5% F.S. (±0.1% F.S. optional) | |
| Temperature Range¹ | –20°C to +80°C | |
| Length x Diameter | 203 x 38.1 mm | |
| ¹High temperature versions available on request. |
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Model 4500HT
High Temperature Piezometer
The Model 4500HT High Temperature Piezometer is
designed for applications where the temperature may be as high as 230°C.
Two versions are available, one for continuous use up to 200°C and
one for up to 230°C. Teflon cables inside stainless steel tubing
are normally supplied with these sensors.*
| Specifications | |
| Standard Ranges | 350, 700 kPa; 1.0, 2.0, 3.0, 5.0, 7.5, 10, 25, 50, 75, 100 MPa |
| Over Range | 2 x rated pressure |
| Sensitivity | 0.025% F.S. (minimum) |
| Accuracy | ±0.1% F.S. |
| Linearity | < 0.5% F.S. (±0.1% F.S. optional) |
| Temperature Range | –20°C to +200°C |
| Length x Diameter | 133 x 19.1 mm |
Model 4500MLP
Multilevel Piezometer
The Model 4500MLP system overcomes the problems
associated with the installation of multiple piezometers in a single
drill hole. The 4500MLP is lowered into position and a spring loaded
apparatus is actuated forcing specially configured piezometer filter
elements into firm contact with the borehole walls. The borehole is
then grouted from the bottom in one quick and simple operation. The
design obviates the need for sand lenses around the piezometer tips.
Versions with sampling capabilities are also available.*
| Specifications | |
| Standard Ranges | 70, 180, 350, 700 kPa; 1.7, 3.5, 7.0 MPa |
| Over Range | 2 x rated pressure |
| Sensitivity | 0.025% F.S. (minimum) |
| Accuracy | ±0.1% F.S. |
| Linearity | < 0.5% F.S. (±0.1% F.S. optional) |
| Temperature Range | –20°C to +80°C |
| Borehole Diameter | 76 to 152 mm |
Model 4500Ti
Titanium Piezometer
The Model 4500Ti is designed specifically for use
in highly corrosive environments such as landfills and leach fields.
Also used in critical areas where long-term survivability is essential,
for example, as in nuclear waste repositories and aggressive mine tailings.
All exposed surfaces are made from titanium.*
| Specifications | ||
| Standard Ranges¹ | 350, 700 kPa; 1.0, 2.0, 3.0, 5.0, 7.0 MPa | |
| Over Range | 2 x rated pressure | |
| Sensitivity | 0.025% F.S. (minimum) | |
| Accuracy | ±0.1% F.S. | |
| Linearity | < 0.5% F.S. (±0.1% F.S. optional) | |
| Temperature Range² | –20°C to +80°C | |
| Length x Diameter | 125 × 25.4 mm | |
| ¹Other
ranges available on request. |
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