File Name
Total Earth Pressure Cell Brochure
Resource Type
Brochure| Language | Version | Download |
|---|---|---|
| English | LPB0001U |
|
Total Earth Pressure Cell
Total Earth Pressure Cells are designed to measure stress acting on plane surfaces.
Overview
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.
TOTAL EARTH PRESSURE CELL SPECIFICATIONS
| ITEM | MODEL LPTPC-V | MODEL LPTPC-S |
| Transducer Type | Vibrating Wire | Silicon Strain Gauge |
| Range – Standard Calibration | Up to 3.0 MPa (435 psi) | Up to 3.0 MPa (435 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 sq. Wave | Dependent on sensor |
| Signal Output | 1200 – 3550 HZ | 4-20 mA 0-5 VDC 0-10 VDC 4-20 mA + RS485 0-5 VDC + RS485 |
| Thermistor | Yes (standard) | Optional (can be added) |
| Conductor | 4 X #22 (2 for VW, 2 for Thermistor) | 4 X #22 | 2 X #22 |
| Operating Temperature | -20 °C to +80 °C / -4°F to +176 °F | -20 °C to +80 °C / -4°F to +176 °F |
Total Earth Pressure Cells are commonly used for:
- Earth embankments and dams.
- Foundations, retaining walls, and piles.
- Pipelines and culverts.
- Railroad bases.
- Beneath raft foundations.
- Tunnel linings.
- Mine backfill monitoring.
View illustrations on how Total Earth Pressure Cells are used for:
Total Earth Pressure Cells Ordering Info
| RANGE CATEGORY | PRESSURE RANGE | SENSOR TYPES | NOMINAL DIAMETERS | MOUNTING OPTIONS | ORDERING EXAMPLES |
| Low Pressure (LP) | 0.07 MPa | Vibrating Wire/Strain Gauge | 9″, 12″ | No ears/ 4EARS | LPTC-9-V-LP-0.07-4EARS |
| 0.175 MPa | Vibrating Wire/Strain Gauge | 9″, 12″ | No ears/ 4EARS | LPTC-9-S-LP-0.175-4EARS | |
| Standard (–) | 0.35 MPa | Vibrating Wire/Strain Gauge | 9″, 12″ | No ears/ 4EARS | LPTC-9-V-0.35-4EARS |
| 0.70 MPa | Vibrating Wire/Strain Gauge | 9″, 12″ | No ears/ 4EARS | LPTC-9-S-0.7 | |
| 1.0 MPa | Vibrating Wire/Strain Gauge | 9″, 12″ | No ears/ 4EARS | LPTC-12-V-1.0 | |
| 2.0 MPa | Vibrating Wire/Strain Gauge | 9″, 12″ | No ears/ 4EARS | LPTC-9-V-2.0-4EARS | |
| 3.0 MPa | Vibrating Wire/Strain Gauge | 9″, 12″ | No ears/ 4EARS | LPTC-9-S-3.0 | |
| High Pressure (HP) | 5.0 MPa | Vibrating Wire/Strain Gauge | 9″, 12″ | No ears/ 4EARS | LPTC-12-S-HP-5.0 |
| 10.0 MPa | Vibrating Wire/Strain Gauge | 9″, 12″ | No ears/ 4EARS | LPTC-9-V-HP-10.0-4EARS | |
| 20.0 MPa | Vibrating Wire/Strain Gauge | 9″, 12″ | No ears/ 4EARS | LPTC-12-S-HP-20.0 |
Other Ordering Info
| ITEM | PART # |
| Standard Cable | EL380004 |
| Heavy Duty Cable | EL380004HDL |
| Cable with HDPE Jacket | EL342202 |
| Mounting Ears (4 tabs) | LPTPC-4EARS |
ORDERING EXAMPLE: LPTPC-Ø-X-RANGE-MOUNT
| FIELD | DESCRIPTION |
| Ø | Nominal cell diameter: 9” or 12” |
| X | Sensor type: V= Vibrating Wire, S= Silicon Strain Gauge |
| R | Range group: LP= Low Pressure, HP= High Pressure, Blank= Standard |
| RANGE | Pressure ranges in MPa (LP: 0.07 and 0.17, Standard: 0.35, 0.7, 1.0, 2.0 and 3.0MPa, HP: 5.0, 10.0, and 20.0 MPa |
| MOUNT | Mounting option: blank= No Ears, 4EARS= 4-point ear mount |
File Name
Total Earth Pressure Cell Installation and User Manual
Resource Type
Manual| Language | Version | Download |
|---|---|---|
| English | LPM0009E |
|
Speak with an Expert
I’m very happy with the quality of the instrumentation and technical support from RST, as always. They worked with us from the initial stages of the project to ensure that we were fully prepared and equipped to use the RSTAR network for the first time. They delivered everything within the tight project time frame to ensure that there were no delays on site, and the submersible tilt meters looked like new even after over twelve months of being submerged in Thames water!
-Richard Lipscombe, BEng (Hons), Director & Principle Consultant - RL Geotechnical Ltd