OSMOS sensors and their utilisation

FAQ

What are the main OSMOS Canada Sensors?

  • Optical Strands: Measure variations in lengths over long measurement ranges
  • Optical extensometer: Measures local displacements
  • X-Trigger: Detects the threshold between two points
  • Caterpillar optic sensor: Measures geotechnical movements
  • Monitoring station: A signal processing unit for collecting and relaying data

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What can I measure with OSMOS sensors?

OSMOS sensors have been designed to process vital information, such as variations in stress, deformation and elongation, and transmit it in terms of static and dynamic measurements.

Can I use the OSMOS Canada system for dynamic measurements?

The OSMOS system is capable of registering static and dynamic measurements (scanned at a maximum of 100 Hz) instantaneously, within the same time base.

What are the longest measurement lengths in which OSMOS Canada optical strands are available?

Optical Strands come in standard lengths: 2 m, 5 m and 10 m. If requested, specific lengths up to 20 m can be produced.

What is the maximum deformation which OSMOS Canada optical sensors can measure?

OSMOS Optical Strands have a maximum measuring range of 500 mm; in terms of dynamic tracking, they are precise within a range of +/- 0.002 mm.
OSMOS optical extensometers have a measuring range of 5 mm; in terms of dynamic tracking, they are precise within a range of +/- 0.002 mm.
Our X-Large sensor has a measuring range of 500 mm. It is precise within a range of 0.5mm.

What is the maximum distance between the OSMOS Canada sensors and the monitoring station?

It may be up to 4 km without the use of amplifiers or signal conditioning units.

On which type of surface can the OSMOS Canada sensors be installed? How?

OSMOS sensors can be installed on or in all kinds of building materials: such as concrete, metal, wood, masonry, mortar and rocks. The anchor points at the ends of the sensors can be attached to the building structure by being screwed in to it, bolted in, glued, or by any other mechanical attachment method.

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Can OSMOS Canada sensors be used outdoors long-term?

Yes. The OSMOS system is extremely robust and reliable in the long-term. For long-term use, it is easy to protect OSMOS sensors against natural elements, such as ultra violet rays, birds and rodents, as well as against mechanical attacks of all kinds, through simple and traditional methods, such as surrounding them by casings.

Can OSMOS Canada sensors be installed in concrete?

Optical Strands in flexible steel hoses are designed so that they can be cast in concrete, mortar or any other type of matter which can be shaped.

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How long is the useful life of sensors installed in concrete?

Experience has shown that Optical Strands which are correctly installed in concrete stand up well to the casting process.

Can OSMOS Canada sensors be re-used?

Sensors installed on the surface of building structures can be used many times again. Sensors cast in concrete cannot be reused.

Can OSMOS Canada sensors be repaired?

If the damage to the optical sensor was on the connection cable, it can be repaired merely by optical soldering on site. But, if the damage is to a sensitive part of the sensor, it would be advisable to replace it.

How long is the expected useful life of OSMOS Canada sensors?

On the basis of experiments which accelerate ageing, the results of which were extrapolated to our actual experience, we believe that OSMOS sensors have a very long useful life. We consider that 90% of the sensors which work after they have been installed will last for at least 20 years, without necessitating heavy maintenance.

How do variations in temperature affect OSMOS Canada sensors?

Very little (in comparison with the effects on the sensor’s support unit). Thus, an Optical Strand would be affected to the extent of 0.6*10-6 m/K, which is 20 times less than for steel.

Are OSMOS Canada sensors resistant to natural and industrial corrosion?

OSMOS sensors are manufactured in extremely lasting materials (e.g. 316ti grade stainless steel, quartz). Thus, they can be used in most areas which may be subject to corrosion. If, however, they were to be used in environments where there are high levels of corrosion (e.g. the chemicals industry), we would examine each case individually.

Can OSMOS Canada sensors be used at high temperatures?

Yes, OSMOS sensors have a working temperature range comprised between: -40°C and +60°C.