Resistive Piezometers And Pressure Transducers
- Sisgeo Resistive Piezometers And Pressure Transducers to measure soil pore pressure or water table level in standpipe piezometers, Casagrande piezometers or wells.
- Different filter porosity permit to suit specific applications in any particle size soil.
- Output signals, suitable for transmission over long distances, are easily read and automated.
- Applications include automatic measurement of ground water levels, measurement of permeability and hydraulic gradients in dams and in natural or cut slopes.
- Resistive piezometers are available with also titanium body: they are specially designed for application in landfills, leach fields or any other corrosive application.
- They could be also applied into nuclear waste repositories or into aggressive mine tailings where long term survival is required
| MODEL | 0P235S4 | 0P235S1 |
| Description | piezo-resistive piezometer with LAE filter | piezo-resistive piezometer with HAE filter |
| Available full scales (FS) | 200 kPa, 500 kPa, 1.0 MPa, 2.0 MPa, 5.0 MPa (29 psi, 72.5 psi, 145 psi, 290 psi, 725 psi) | 200 kPa, 500 kPa, 1.0 MPa, 2.0 MPa, 5.0 MPa (29 psi, 72.5 psi, 145 psi, 290 psi, 725 psi) |
| Overload |
1.3 x FS (200 kPa range) 2 xFS (for all other ranges) |
1.3 x FS (200 kPa range) 2 xFS (for all other ranges) |
| Sensitivity | 0.01% FS | 0.01% FS |
|
Total Accuracy (1) Lin. MPE Pol. MPE |
< ±0.25% FS
< ±0.20% FS (for 100 and 200 kPa FS) < ±0.15% FS (all other FS) |
< ±0.25% FS
< ±0.20% FS (for 100 and 200 kPa FS) < ±0.15% FS (all other FS) |
| Signal output | 4 - 20 mA current loop | 4 - 20 mA current loop |
| Electric supply | 12 -40 V DC | 12 -40 V DC |
| Thermic zero shift | 0.00025 % FS /°C | 0.00025 % FS /°C |
| Electric insulation | 4 KV | 4 KV |
| Temp. operating range | -20 to +80 °C | -20 to +80 °C |
| Temperature sensor | built-in thermistor, added on request | built-in thermistor, added on request |
| Material | stainless steel | stainless steel |
| Dimensions | Ø 27 mm (1.1”), length 193 mm (7.6”) | Ø 27 mm (1.1”), length 193 mm (7.6”) |
| Weight | 0.5 kg (1.1 lbs) | 0.5 kg (1.1 lbs) |
| FILTER UNIT | ||
| Type | LAE filter | HAE filter |
| Material | stainless steel or vjon | ceramic |
| Pore size | 40-50 μm | 0.25 μm |
| SIGNAL CABLES | ||
| 0WE102KEOZH | standard 2-wire cable with LSZH jacket and Kevlar stress member | standard 2-wire cable with LSZH jacket and Kevlar stress member |
| 0WE104K00ZH | 4-wire cable with LSZH jacket, used if thermistor is added | 4-wire cable with LSZH jacket, used if thermistor is added |
| 0WE104K00PV | 4-wire cable with PVC jacket, used if thermistor is added | 4-wire cable with PVC jacket, used if thermistor is added |
| Max cable length to logger (2) | 1000 m (for more information see FAQ#77) | 1000 m (for more information see FAQ#77) |
