RocTest - SSG Vibrating Wire Soil Settlement Gauge
Vibrating Wire Sensor
    Model: SSG Vibrating Wire Soil Settlement Gauge
    Country of Origiin: Canada
    Use: The SSG is a soil settlement gauge used to measure settlement or heave at a precise location in soils.
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DESCRIPTION

The SSG consists of a vibrating wire or fiber optic pressure transducer housed in a corrosion-resistant stainless steel body. The housing is normally attached to a base plate and connected to a reference station by a twin tubing filled with water (or anti-freeze solution) and fitted with connectors. The reference station consists of a liquid-filled reservoir open to atmospheric pressure and located at a known elevation. The settlement or heave is measured relatively to the elevation of the reservoir.

The SSG is robust and stable. It can be installed in boreholes, standpipes, soil or concrete. The settlement gauge can also be attached to structures for monitoring settlement. To ensure maximum performance, the twin tubing should be flushed at regular intervals to remove air bubbles, and data should be compensated for temperature changes and changes in atmospheric pressure. For best results, de-aired water or antifreeze solution is recommended.

SPECIFICATIONS
   

Settlement range

51, 101, 20, 35, 50, 75 m

Transducer type

Vibrating wire or fiber optic

Maximum overpressure

1.5 × range

Accuracy2

±0.5% F.S. (±0.1% F.S. optional)

Resolution

0.025% F.S. (min.)

Thermal drift or transducer

±0.1% F.S. / oC

Reservoir

PVC and ABS

Fluid type

Water (optional antifreeze solution)

Thermistor

3kΩ (see model TH-T) – with vibrating wire transducers only

Twin tubing

Polyethylene, 1/4 in. X 0.170 in.

Cable

IRC-41A(P), IRC-390, CFO-3STD, CFO-9RF

1 With IRC-41 AV cable. Available for VW transducers only
2 Calibrated accuracy of the pressure transducer.
 
Note: Please refer to FOP data sheet for specifications of FO pressure transducers.
 
ORDERING INFO

Please specify:

  • Range and transducer type
  • Cable type and length
  • Twin tubing length
  • Fluid type: water or antifreeze solution
  • If length of tubing  exceeds 300 m, contact manufacturer for selecting adequate  tubing size
 

Optional equipments:

  • Readout instruments: MB-3TL, SENSLOG

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