Geotechnical load cells TOR-IDRA/CE
Download PDF datasheet
The hydraulic TOR-IDRA/CE load cell has been designed to be placed at the base of structures of armor to measure the load they transmit to their foot . Such control is essential to ensure the safety of permanent support works.
Hydraulic load cells are typically installed at the piers of galleries, below the support of the ribs, and have a shape and size such as to simplify the installation. It is also possible to provide on demand load cells for specific applications or with different specifications from the standard ones.
The cell consists of two steel plates of circular shape, machined and welded together in such a way as to create an interspace filled by a special oil and connected to an electric transducer which transforms every variation of pressure acting on the lung in a variation of signal electric with standard output 4 to 20 mA.
All sensor parts, including cables, are isolated and protected, to avoid concrete entrance within the cell; circuits and sensors are potted and protected in order to preserve the functionality of the instrument in the shock or immersion events. Reading the electrical pressure transducer data may be made through the use of a portable control unit or via an automatic data acquisition system designed for the continuous monitoring.
| Model | FS (t) | A (mm) | B (mm) | C (mm) |
| 1 | 190 | 200 | 220 | 38 |
| 2 | 300 | 246 | 270 | 38 |
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Technical specifications
| Material | Stainless steel with corrosion protection |
|---|---|
| Nominal load | 190, 300t |
| Supply voltage | 8 - 32 V dc |
| Output | 4 - 20 mA (2 cables) |
| Linearity | 0,25 % of full scale |
| Operating temperature | -40 / +100°C (-40 / +212°F) |
| Protection class | IP 67 |
| Sensor type | Piezoresistive |
| Sensor body | Stainless stees AISI 303 |
For complete and up-to-date technical specifications please refer to the datasheet you can download here
Download PDF datasheet Connections
Load cell mounting
General guidelines for installing and mounting load cells:
- Respect the direction in which forces are applied to the load cells
- Do not exceed the temperature limits shown on the rating plate
- Do not remove the labels from the cells
- Protect cables properly with sheaths or cable ducts
- Connect each cell to earth with a suitable cable, bridging the plates of the mounting accessories if necessary
- Do not weld on the mechanical structure once the cells are in place
- Avoid or minimise mechanical constraints between the fixed structure and the weighed structure, to prevent weighing errors and zero return problems
- When vibrations or dynamic loads are present, protect the cells with anti-vibration mounts
- Protect the cells from dust build-up with suitable covers