Description
Vibrating Wire Piezometer – Model EPP-40V
The EPP-40V vibrating wire piezometer is a compact and precise instrument designed for measuring pore water pressure in small-diameter boreholes and standpipes.
Constructed from stainless steel, it features a built-in thermistor for temperature compensation and a surge arrester for lightning protection.
A glass-to-metal sealed connector ensures a reliable and watertight cable connection.
The sensor is hermetically sealed under a vacuum of approximately 0.001 Torr, ensuring long-term stability and corrosion resistance.
Each unit is supplied with a ceramic low-air-entry flat filter (40–60 microns) unless otherwise specified.
Specifications
| Parameter |
Details |
| Range (MPa) |
0.35, 0.5, 0.7, 1.0, 2.0 |
| Accuracy |
± 0.2 % FS (standard) |
| Non-linearity |
± 0.5 % FS |
| Over-range limit |
150 % FS |
| Temperature range |
−20 °C to +80 °C |
| Thermistor |
YSI 44005 or equivalent |
| Dimensions (Ø × L) |
19 × 155 mm |
Technical Summary
| Instrument Name |
Piezometer |
| Sensor Type |
Vibrating wire |
| Construction |
Compact / slim profile |
| Applications |
Installation in small boreholes and standpipes for monitoring water level and pore pressure |
| Measured Parameter |
Pore pressure / Water level |
| Range Options |
0.35 to 2.0 MPa |
| Testing / Calibration |
Thermal cycling (−20 °C to +80 °C), pressure cycling (2000 cycles), reverse pressure test, individual temperature compensation and calibration for high accuracy and repeatability |
| Key Features |
Electron-beam welded, hermetically sealed design for long-term stability |
| Waterproof Rating |
IP-68 – fully submersible up to maximum operating pressure |
| Dimensions |
Ø 19 mm × 155 mm L |
