Standpipe Piezometer

The Standpipe Piezometer has a perforated PVC body containing a 70 micron filter element. It allows levelling and sampling of groundwater and in-situ permeability testing. Upgrading with a diaphragm type piezometer (Model 1100 or Model 1200) is possible at a different stage.

A large number of uniform pores permit high permeability in a short length. To get the same open area as a 300 mm length of plastic filter material. One would need 7 m of a standard 25 mm slotted pipe.

Drive-in models are available (Model 1050).

Applications

• Monitoring of pore pressures in dams and embankments
• Slope stability analysis
• Leachate extraction
• Groundwater sampling and monitoring
• Dewatering and drainage operations

Features

• Protected filter element
• Uniform filter porosity
• Smooth filter element resists clogging
• May be cleaned by backflushing
• Excellent chemical resistance
• Drive-In models available (galvanised steel)

Specifications

• Permeability: 3 x 10-4 m/s (low air entry)
• Pore diameter (microns): 70
• Filter area (cm2): 245
• Dimensions (PVC) (mm): Ø 33.4 x 354
• Dimension (galvanised steel) (mm): Ø 33.8 x 370
• Weight (PVC) (kg): 0.14
• Weight (galvanised steel) (kg): 1