RST Vibrating Wire Piezometer

Product Information

The RST Piezometer is designed to measure fluid pressures such as groundwater elevations and pore pressures when buried directly in embankments, fills, etc.

The RST Vibrating Wire Piezometer provides excellent long-term accuracy, stability of readings, and reliability under demanding geotechnical conditions. Vibrating Wire Piezometers are the electrical piezometers of choice as the frequency output of VW devices is immune to external electrical noise and able to tolerate wet wiring common in geotechnical applications.

Product Features:

• Over range 2 X F.S.
• Resolution 0.025% F.S. minimum
• Accuracy 0.1% F.S.
• Linearity <0.5% F.S.
• Operating Temperature -20 to 80°C (-4 to 176°F)
• Diaphragm Displacement <0.001 cc at F.S.
• Thermal Zero Shift <0.05% F.S./°C
• Materials Hermetically sealed stainless steel housing
• Thermistor Type NTC 3K Ohms @ 25°C
• Thermistor Interchangeability ±0.2°C
• Thermistor Resolution 0.1°C
• Filter 50 micron sintered filter. (High air entry alumina filter 1 Bar available)

Product Benefits:

• Field proven reliability and accuracy
• Hermetically sealed, stainless steel construction
• Heavy case to minimize reading errors caused by overburden pressure
• Integral lightning protection
• Signal transmission of several kilometer
• Data logger compatible
• High Accuracy – IE a low pressure vented model will measure water level changes as small as 0.5 mm (0.02 in.)
• Will tolerate wet wiring common in geotechnical applications
• Thermistor for temperature measurement is standard
• Negligible displacement of pore water during the measurement process
• Cable lengths may be changed without affecting the calibration

Typical Applications Include:

• Assessing performance and investigating stability of earth fill dams and embankments
• Slope stability investigations
• Monitoring water levels in wells and standpipes
• Monitoring pressures behind retaining walls and diaphragm walls
• Monitoring pore pressures during fill or excavation
• Monitoring pore pressure in land reclamation application