Description
The PW-ML multi-level piezometer consists of multiple piezometers connected to a single communication cable, which is in turn connected to the data acquisition system (SENSLOG) or readout (MB-3TL).
A typical installation of the multi-level piezometer utilizes a direct grouting installation so that only the multi-level piezometer string and a grout injection tube are needed to complete the installation. Once the grout has hardened, the piezometers are isolated from one another, allowing precise measurements of pore water pressure changes at various depths.
The multi-level piezometer allows the customer to define sensor spacing along the readout cable providing precise depth control based on site specific requirements. Junctions between each piezometer and the main cable are reinforced using epoxy resin for a waterproof and durable seal.
SPECIFICATIONS
| Range | 0.2, 0.35, 0.5, 0.75, 1, 1.5, 2, 3, 5 MPa | |
| Accuracy1 | ± 0.1% F.S. | |
| Linearity1 | < ± 0.5% F.S. | |
| Resolution with MB-3TL | 0.025% F.S. (min.) | |
| Thermal drift | ± 0.1% F.S. / °C | |
| Thermistor | 3 kΩ (see model TH-T) | |
| Cable | IRC-241 | |
| PIEZOMETER MODEL | PWS | |
| Length | 200 mm | |
| Outside diameter | 19 mm | |
| Housing material | Stainless steel | |
| Filter | Stainless steel, ~ 50 μm, ~ 10 kPa, low air entry pressure Ceramic, ~ 1 μm, ~ 450 kPa, high air entry pressure |
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| PART NUMBER | DESCRIPTION | PLEASE SPECIFY |
| FR-1100G50100 | Sleeve for sensor’s tight connections | Number of piezometers per chain (max. 6 with temperature, 12 without temperature) Filter type (stainless steel or ceramic) |
| FR-1100DPWS | PWS piezometer | Measuring range for each sensor Distance from the ground for each sensor |
| CA-IRC241 | 11.7-mm O.D., 12 shielded pairs cable | Total length of the cable, including enough length to reach readout or logger) |
| FR-1356050100 | Readout unit | MB-3TL or SENSLOG |
