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Wall hydraulic settlement gauge

The Liquid Settlement System for wall is extensively used for differential monitoring of structures subject to settlement or heave as residential and historical buildings.

The main components of this system are: a reservoir (single or multiple), liquid-filled tubing and piezoelectric transducer cells located on the wall of buildings wall.

Each piezoelectric sensor is connected via hydraulyc tubing with the reservoir positioned in one inamovable site. The quote variation between reservoir and one or more sensors positioned on the wall subject to settlement or heave is converted in pressure variation and in the quote changes (in mm of movement). Every pressure’s variation on the each piezoelectric sensor make a variation of electrical signal of trasducer which is acquired by specific unis of measurement.

For greater accuracy moreover these readings are netted from the atmospheric pressure and temperature changes in the time.

TECHNICAL FEATURES

  • Type of sensor: piezoelectric;
  • Standard Range: 1, 2, 4 m (10, 20, 40 kPa);
  • Barometric sensor: piezoelectric sesnor 10 kPa;
  • Output signal: 4-20 mA;
  • Overpressure: 1,5 x F.S.;
  • Electrical power supply: 8-28 Vdc;
  • sensor accuracy: +/- 0,15% F.S.;
  • Total thermal error: 0,03% F.S/°C;
  • Long term stability: 0.2% F.S./year;
  • Operating temperature: from -20 to +80 °C;
  • The reservoir can have from 1 until 9 cells (depends on tube length).
  • Protection class sensor: IP 68.

DIMENSIONAL SPECIFICATIONS

  • dimensions plate and material: 205X105X1,5 mm, stainless steel
  • dimensions sensor box and material: 175X75X60 mm, anodized aluminum
  • dimensions tubing and material: 6 mm O.D., polyethylene
  • dimensions reservoir and datalogger box and material: from 400x300x150 mm until 800x800x250 mm, anodized aluminum
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