Fixed Extensometers
Fixed Extensometers
Fixed Extensometers

 

  • Sisgeo Fixed Extensometers defined as device placed in embankment fill or inside borehole for monitoring of settlement or heave between two points without use of a removable probe.
  • Either the Settlement Platform and the Tell-Tale extensometer are based on a riser settlement rod which is respectively connected to a plate buried at the embankment foundation level or grouted inside borehole as a deep benchmark in a firm soil.
  • Optical levelling measurements to the top of the riser rod provide precise monitoring.
  • Electrical transducer can be used for remote readings without the need of survey crew.
  MEASURING ROD 0D100A20000 CORRUGATED SHEATH 0D111PV5500
Outer diameter 25 mm 55 mm (nominal)
Section length 2000 mm supplied in roll
Type of junction external couplings (M25 thread) continuos (self-screwing connection)
Material stainless steel PVC
     
  MEASURING HEAD 0D100TT0100 BOTTOM ANCHOR 0D100TT6000
Description Protective cap and leveling pin for topographic surveying Grouting bottom reference anchor
Outer diameter 102 mm 60 mm
Length 550 mm 600 mm
Material stainless steel and PVC stainless steel

 

  MEASURING ROD 0D100A20000 CORRUGATED SHEATH 0D111PV5500
Outer diameter 25 mm 55 mm (nominal)
Section length 2000 mm supplied in roll
Type of junction external couplings (M25 thread) continuos (self-screwing connection)
Material stainless steel PVC
     
  BOTTOM ANCHOR 0D100TT6000 MEASURING HEAD 0D100TTEL10
Description Grouting bottom reference anchor Protective cap rady for DTM displacement transducer
Diameter 60 mm 102
Length 600 mm 400-650-1150
Material stainless steel stainless steel

 

DTM DISPLACEMENT TRANSDUCER 0DTM0AE0250 0DTM0AE0500 0DTM0AE01000
Nominal range 250 mm 500 mm 1000 mm
Measuring range 210 mm 460 mm 960 mm
Linearity ± 0.05 % FS ± 0.05 % FS ± 0.05 % FS
Repeatability < 0.08 mm < 0.08 mm < 0.08 mm
Hysteresis ≤ 0.25 mm ≤ 0.25 mm ≤ 0.25 mm
Signal output 4-20 mA (current loop) 4-20 mA (current loop) 4-20 mA (current loop)

 

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