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Total Earth Pressure Cells

RST Instruments - Load cells + Pressure Sensors + Stress Meters
Total Earth Pressure Cell DESCRIPTION
  • Total Earth Pressure Cells are designed to measure stress acting on plane surfaces.
  • Total Earth Pressure Cells are constructed from two circular stainless steel plates, welded together around their periphery.
  • The annular space between these plates is filled with deaired glycol.
  • The cell is connected via a stainless steel tube to a transducer forming a closed hydraulic system.
  • The stress is then converted to a signal and may be remotely read on a variety of portable readout units or data loggers.
  • RST Total Earth Pressure Cells are calibrated as a complete assembly (rather than just the sensor) to capture the calibration of the complete cell for highest quality of data.

 

FEATURES
  • Long term stability.
  • High accuracy and sensitivity.
  • Constant monitoring capability.
  • Ease of data logging.
  • Stainless steel construction.
  • Either vibrating wire or strain gauge transducers.
  • The transducer is located 46 cm (18 in.) from the cell to avoid any influence from the transducer housing.
  • A 20:1 height to diameter ratio minimizes the effects of stress distribution on the mean plane. (9 in. and 12 in. models).
APPLICATIONS
  • Earth embankments and dams.
  • Foundations, retaining walls, and piles.
  • Pipelines and culverts.
  • Railroad bases.
  • Beneath raft foundations.
  • Tunnel linings.
  • Mine backfill monitoring.
  • SPECIFICATIONS
DESCRIPTION MODELS
LPTPC-V LPTPC-S
Transducer Type Vibrating Wire Silicon Strain Gauge
Range-Standart Calibration Up to 2.0 Mpa (300 psi) Up to 2.0 Mpa (300 psi)
Range-Max Available 20 Mpa (3000 psi) 20 Mpa (3000 psi)
Calibrated Accuracy 0.15% F.S. 0.15% F.S.
Resolution 0.025% F.S. minimum Infinite
Excitation Voltage 5 V sw. Wave Dependent on sensor
Signal Output 1200 – 200 Hz 4 – 20 mA
Thermistor Yes (standart) Optional (can be added)
Conductor 4 X #22 (2 for VW, 2 for Thermistor) 4 X #22   /  2 X#22
Operating Temperature  -29° to +65°C     -20° to +150°F
  • ORDERING INFO
TRANSDUCER STANDARD CELL DIA.

STANDARD PRESSURES

(0.35 MPA – 3 MPa)

HIGH PRESSURES

(>3 MPa – 20 MPa)

LOW PRESSURES

(<0.35 MPa)
Vibrating Wire Axial 16.2 cm(6.38 in.) LPTPC06-V-M LPTPC06-V-M-HP –
Vibrating Wire 24.1 c m(9.5 in.) LPTPC09-V LPTPC09-V-HP LPTPC09-V-LP
Vibrating Wire 31.7 cm(12.5 in.) LPTPC12-V LPTPC12-V-HP LPTPC12-V-LP
Silicon Strain Gauge 24.1 c m(9.5 in.) LPTPC09-S LPTPC09-S-HP LPTPC09-S
Silicon Strain Gauge 31.7 cm(12.5 in.) LPTPC12-S LPTPC12-S-HP LPTPC12-S

 

RST Instruments – Load cells + Pressure Sensors + Stress Meters

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София, 1421, бул. „Свети Наум“ № 27

Плевен, 5800, ул. „Св.Св. Кирил и Методи“ № 18

Warsaw, Poland

San Pedro Alcantara-Marbella (Malaga), Spain 29670, Avenida Virgen del Rocío s / n, La Colonia Shopping Center, Office 12

+359 2 426 18 80

+359 2 426 08 82

office@sentra.bg

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