PIEZOMETER
Electrical Uplift Pressure Sensor
Uplift pressure measuring device consists of a perforated/non-perforated pipe of 50 mm dia of adequate strength. The pipe is inserted in a drilled hole in the foundation from the instrumentation gallery to the required depth.
Specifications
Model EPU-20V uplift pressure sensor incorporates the latest vibrating wire technology to provide remote digital readout of fluid and/or water pressure in standpipes, bore holes and embankments. It is similar to the model EPP-30V piezometer except that instead of the special filter, a 25 mm BSP adaptor is provided for the pipe connection. The water oozing through internal pores or seams in rock formations of dam foundations, mass concrete /foundation soil of structures, reclaimed land soil etc. percolates upward through the pipe to the sensor
| Range (MPa) | 0.2, 0.35, 0.5, 1.0, specify |
| Accuracy | ± 0.25 % fs normal
± 0.1 % fs optional |
| Non linearity | ± 0.5 % fs |
| Resolution | 0.025% fs |
| Over range limit | 150 % of range |
| Temperature limit | -20°C to 80°C |
| Thermistor | YSI 44005 or equivalent |
| Dimension (dia x L) | 42 x 210 mm |