Hydraulic Pressure Cells
- Sisgeo Hydraulic Pressure Cells designed to measure stress in mass concrete or placed at the interface between the structure and the wall of excavation.
- The pressure pad consists of two steel plates welded together around their periphery and spaced apart by a narrow cavity saturated under vacuum with de-aired oil which guarantee maximum rigidity.
- A length of high-pressure rilsan tubing connects the cavity of the pressure pad to the pressure transducer.
- A repressurizing device is available for expanding the cell after the concrete has cured.
- Readings are obtained with portable readout units or dataloggers.
| Model | 0L111151500 | 0L111102000 | 0L111152500 | 0L111204000 | 0L111D05000 |
| Main application | radial stress in concrete (with repressuring valve) | tangential stress in concrete (with repressuring valve) | contact soil/rock-structure (with repressuring valve) | contact soil/rock-structure (with repressuring valve) | contact soil-concrete (no repressuring valve) |
| Material | galvanized steel | galvanized steel | galvanized steel | galvanized steel | stainless steel |
| Pad size | 150 x 150 mm (5.9" x 5.9") | 100 x 200 mm (3.9" x 7.9") | 150 x 250 mm (5.9" x 9.8") | 200 X 400 mm (7.9" x 15.7") | circular, 500 mm OD (19.7" OD) |
| Weight | 0.6 kg (1.3 lbs) | 0.6 kg (1.3 lbs) | 1 kg (2.2 lbs) | 1.9 kg (4.2 lbs) | 0.6 kg (1.3 lbs) |
| Working pressure |
up to 5.0 MPa up to 725 psi |
up to 20.0 MPa up to 2900 psi |
up to 10.0 MPa up to 1450 psi |
up to 5.0 MPa up to 725 psi |
up to 1.0 MPa up to 145 psi |
| Model | PK45H MODEL | P252A MODEL |
| Description | VW pressure transducer | piezo-resistive pressure transducer |
| Full scales (FS) |
0-350 kPa up to 0-20.0 MPa 0-50 psi up to 0-2900 psi |
0-200 kPa up to 0-20.0 MPa, 0-29 psi up to 0-2900 psi |
| Sensitivity | 0.03% FS | 0.002% FS |
| Total accuracy (1) |
< ±0.25% FS (< ±0.1% FS on request) |
< ±0.20% FS (for 200kPa FS) < ±0.15% FS (all other FS) |
| Typical frequency range (2) | 2250 - 3000 Hz | - |
| Output signal | frequency | 4-20 mA current loop |
| Electrical supply | - | 12-24 VDC |
| Operating temperature range | -20°C +80°C | -20°C +80°C |
| Transducer size |
OD 27mm, 180mm long OD 1", 7.1" long |
OD 27mm, 180mm long OD 1", 7.1" long |
| Material | stainless steel | stainless steel |
| Weight | 0.6 kg (1.3 lbs) | 0.6 kg (1.3 lbs) |
| Cable | 0WE104K00ZH | 0WE102KEOZH |
| Max cable length to logger (3) | 1000 m (for more information see FAQ#77) | 1000 m (for more information see FAQ#77) |
