Electronics Black Wrist Watch
Electronics Black Wrist Watch

FPC-2 Pneumatic Piezometer

Category: Geotechnical & Civil Engineering Instrumentats

HIGH RELIABLITY

PNEUMATIC PIEZOMETER

FOR LONG TERM MONITORING

Rugged, Stable and Accurate FPC-2 pneumatic piezometer suitable for use in both short term and long term monitoring program

 

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The FPC-2 pneumatic piezometer consists of a thin flexible diaphragm on which is applied the fluid pressure. During readout this pressure is balanced by an externally applied nitrogen gas pressure. The readings are obtained when the external gas pressure is equal to the porewater pressure acting on the reverse side of the diaphragm. The volume change associated with pressurization of the diaphragm is extremely small and consequently the response time is very low, even in low permeability soils as clays.

 

The design and the materials (brass or stainless steel) used in the construction of the FPC-2 make it particularly suitable for use in both short- and long-term monitoring programs where ruggedness, stability and reliability are required. An integrated filter on the input gas line prevents the entry of foreign particles into the piezometer.

 

FPC-2 pneumatic piezometers are available with low-air or high-air entry filters. Two models are available: model FPC-2 for borehole installation and model FPC- 2D to be pushed into soft soil.

 

Specifications

 

Range:  0–1000 kPa (standard) ,0–3500 kPa (high pressure)

 

  Accuracy                                                       
  PR-20 readout   ±0.25% F.S. of pressure gauge
  PR-20D Readout   ±0.25% F.S. of pressure transducer
  Diaphragm volumetric displacement   <0.01 cm3
  Standard construction   Brass, stainless steel (optional)
  Filter   Plastic, ~50 µm, ~10 kPa low air entry (standard)
  Stainless steel, ~50 µm, ~10 kPa low air entry
  Ceramic, ~1 µm, ~450 kPa high air entry
  Twin tubing   2 polyethylene tubes (ID: 2.5 mm, OD: 4.7 mm) under a PVC jacket
  Optional   2 nylon 11 tubes (ID: 3.2 mm, OD: 6.3 mm) under a polyethylene jacket

 

 

 

  Dimensions  
  Outside diameter   32 mm
  Length   28 mm (FPC-2), 52 mm (FPC-2D)

 

Ordering Info

 

Please specify:

  •     Model
  •     Measuring range
  •     Filter type

 

Optional accessories:

  •     Quick-connect and plug set for twin tubing
  •     Junction and switching box
  •     Push-rod adapter for the FPC-2D; please specify thread type
  •     Readout instruments: PR-20, PR-20D