Measure pore water pressures, ground water levels and water levels in basins.
DiTeSt SMARTape II Strain Sensor
The SMARTape strain sensors are designed for distributed deformation (average strain) monitoring over long distances, using BOTDR / BOTDA (Brillouin scattering) technologies. It is used for surface installation on smooth surfaces or embedding into composites.
The SMARTape sensor consists of a single mode optical fiber embedded in a Glass Fiber Reinforced Polymer / Epoxy tape. The tape itself provides high mechanical, chemical and temperature resistance. The small size of the tape makes the sensor easy to transport and install. The SMARTape II sensor is designed for use in harsh environments often found in civil and Oil&Gas engineering applications. It is usually glued to the structures, but can also be clamped or embedded in composite materials.
SMARTape sensors are delivered on spools and with all the necessary accessories such as gland nuts (IP65), pigtails and connectors (E-2000, FC-PC or other on request).
DiTeSt SMARTprofile Sensor
The DiTeSt SMARTprofile combined strain and temperature sensors are designed for distributed deformation (average strain) and temperature monitoring over long distances, using BOTDR / BOTDA (Brillouin scattering) technologies.
The DiTeSt SMARTprofile sensor consists of two bonded and two free single mode optical fibers embedded in a polyethylene thermoplastic profile. The bonded fibers are used for strain monitoring, while the free fibers are used for temperature measurements (quantitative if sensor deformation <0.2%, qualitative if sensor deformation >0.2%) and to compensate temperature effects on the bonded fibers. For redundancy, two fibers are included for both strain and temperature monitoring. The profile itself provides good mechanical, chemical and temperature resistance. The small size of the profile makes the sensor easy to transport and install by embedding in concrete or mortars, gluing or clamping. The SMARTProfile sensor is designed for use in environmental conditions typically found in civil, geotechnical and oil & gas applications. However, this sensor cannot be used in extreme temperature environments, nor in environments with aggressive chemicals. It is not recommended for installation under permanent UV radiation (e.g. sunshine) without an additional cover or aluminum tape protection.
The SMARTprofile sensing cable is delivered on spools with all the necessary accessories such termination and connectors (E2000, FC-PC or other).
EM Series Embedded Vibrating Wire Strain Gauge
The EM Series of vibrating wire strain gauges are designed for concrete embedment and to measure strains caused by stress variations. The stress can also be evaluated when the concrete’s modulus of elasticity is known, following compensation for temperature, creeping and concrete reaction effects.
The EM-5 is the standard model and is used in different types of structures such as dams, nuclear power plants, bridges, tunnels, etc. The EM-10 consists of a rugged version to be embedded in concrete with coarse aggregates. The shorter EM-2 model is designed for laboratory use or for limited spaces.
IRHP Instrumented Rebar
The instrumented rebar is a hollow reinforcing bar containing a coaxially mounted vibrating wire strain gauge. It is used for measuring strain and load in concrete structures such as dams, foundations, piles and tunnels linings. It can be used as sister bars, incorporated into a rebar reinforcement system, or grouted into a borehole for ground support.
SM-5 Series Surface Mount Vibrating Wire Strain Gauge
The SM-5 is a surface mount vibrating wire strain gauge used for monitoring variations in strain, allowing stress evaluation when the material’s modulus of elasticity is known. The gauge is mounted on structures such as bridges, piles, tunnels and linings. Two models, differing in their mechanical supports, are available: the SM-5A, which is held tight by set screws, and the SM-5B by hexagonal nuts.
SM-2 Series Miniature Vibrating Wire Strain Gauge
The SM-2 Series of miniature vibrating wire strain gauges is used to measure variations in strain, which allows stress evaluation when the material’s modulus of elasticity is known.
The SM-2 is offered in two models, the SM-2W and the SM-2A, which both differ in their installation. The SM-2W is designed to be spot-welded on a surface and then covered by a protective housing which contains the electromagnet. The SM-2A is generally installed inside a small diameter borehole. Its electromagnet surrounds the connecting tube.
DiTeSt SMARTGeoTex Fabric
Geo-textile structures, besides reinforcing capability in the field of geotechnical engineering, can also be equipped with FO sensors for monitoring purposes. Thus DiTeSt® SMARTGeoTex Fabric becomes an innovative solution that combines the benefits of using geosynthetic materials with the sensing capabilities of FO for geotechnical applications and structural health monitoring.
DiTeSt HDPE Strain Sensor
The DiTeSt HDPE Strain sensor is a unique sensor for the evaluation of distributed strain over several kilometers.
The DiTeSt HDPE Strain sensor is used in a wide range of applications that require distributed strain sensing, such as soil movement and ground monitoring just to name a few.
The DiTeSt HDPE Strain sensor is a small flexible mini armored fiber optic strain sensing cable with central metal tube, metallic armoring wires and HDPE outer sheath. The central metallic tube contains 1 optical fiber offering a strange range up to 1 %.
This sensor is particularly suitable for outdoors environment for direct burial applications, both ground and concrete.
Thanks to the special package design, the DiTeSt HDPE Strain sensor offers high tensile strength, crush resistance, longitudinal lateral water tightness, abrasion resistance with an optimized outer sheath to improve strain transfer and excellent rodent protection.
The DiTeSt HDPE strain sensor is fully compatible with the DiTeSt system and all its accessories.
DiTeSt / DiTemp Hydro & Geo Strain and Temperature Sensing Cable
The Hydro & Geo Sensing cable is a unique fiber optic sensor for the evaluation of distributed strain and temperature over several kilometers, using BOTDR / BOTDA (Brillouin scattering) and DTS (Raman scattering) technologies.
The Hydro & Geo Sensing cable is used in a wide range of applications that require distributed strain and temperature sensing, such as temperature monitoring of concrete in massive structures, waste disposal sites, dams, hydro-structures, geotechnical areas and structures, mines, just to name a few.
The Hydro & Geo Sensing cable is a small fiber optic cable, with a symmetric circular section protected by a dense member of aramid and an outer Low Smoke Zero Halogen – Non Corrosive jacket. The optical fibers are protected by means of Acrylate coating and an outer hard elastomeric tight buffer. The Hydro & Geo Sensing cable contains 4 Single Mode and 2 Multi Mode optical fibers, allowing the sensor to be used both with DiTeSt reading unit for distributed strain and with DiTemp reading unit for temperature monitoring.
This sensor is particularly suitable for outdoors geotechnical applications with different methodology of installation: direct burial in the ground or concrete, integration into geo-textile fabric or surface installation in grooves.
Thanks to the special package design the Hydro & Geo Sensing cable offers high tensile strength, crush resistance, water tightness, chemical and abrasion resistance.
EFO Embeddable Strain Sensor
The EFO is a fiber optic strain gauge designed to be embedded in concrete. It may be cast directly into wet mixture or encapsulated into a concrete briquette to be cast into a wet mixture. Intrinsically safe, it is immune to EMI, RFI and lightning. It allows static/dynamic measurement and can deliver signal transmitted over long distances with no interference due to fiber bending.
SFO-W Spot-Weldable Strain Sensor
The SFO-W is a fiber optic strain gauge used for long-term, precise strain measurements on a variety of structures, corrosive environments, nuclear power plants, dams and suitable for spot-welding on steel surfaces. Intrinsically safe, it is immune to EMI, RFI and lightning. It allows static/dynamic measurement and can deliver signal transmitted over long distances with no interference due to fiber bending.
FOS Strain Gauge
The FOS is a fiber optic strain gauge used to measure the expansion and contraction of materials due to mechanical stress or thermal effect in nuclear power plants, building monitoring and several civil engineering applications. Intrinsically safe, it is immune to EMI, RFI and lightning. It allows, static/dynamic measurement and can deliver signal transmitted over long distances with no interference due to fiber bending.
MuST FBG Strain Sensor
The FBG deformation strain are transducers that transform a static or dynamic distance variation into a change in reflected wavelength of a pre-stressed Fiber Bragg Grating that can be measured with SMARTEC’s FBG reading units.
The strain sensors are designed to be bonded or spot welded to structures and components (metallic, concrete, etc.). These sensors are equivalent fiber optic versions of the conventional resistance strain gauges but completely passive, offering inherent insensitivity to environmental induced drift.
The polyimide strain sensor is the equivalent of the electrical strain gauge and can be installed using the same supplies.
The weldable strain gauge is designed to be spot welded to metallic surfaces, offering a significant increase of productivity in the installation process. This sensor has an optional metallic protection cover for installation in severe environments.
The composite strain gauge is a light-weight and rugged sensor for application in both steel and concrete structures, where the FBG optical fiber is encapsulated in Carbon Fiber Reinforced Polymer (CFRP).
These sensors feature high accuracy and resolution, and immunity to electric sparks and EMI/RFI. They are compatible with most common FBG measurement units and suitable for remote sensing, being possible to install them kilometers away from the measurement unit and connect several sensors in a single optical fiber.
MuST FBG SMARTGeoTex Fabric
Geotextile structures, besides reinforcing capability in the field of geotechnical engineering, can be also equipped with Fibre Optic sensors for monitoring purposes. Thus MuST SMARTGeoTex Fabric becomes an innovative solution that combines the benefits of using geosynthetic materials with the sensing capabilities of Fiber Optic for geotechnical applications and structural health monitoring.
The MuST SMARTGeoTex Fabric uses Fiber Bragg Grating (FBG) technology combined with the TenCate geosynthetics material to measure in soil structures. Eleven FBG sensors are strategically inserted onto two optical fibres embedded onto a 1m wide by 10m long geotextile.
The geosynthetic provides filtering capability in order to prevent scouring phenomena around the sensor and increase the surface of contact hence improving the mechanical coupling with the surrounding soil.
The MuST SMARTGeoTex Fabric sensor is especially suitable for ground settlements and displacements detection in geotechnical structures such as walls, embankments, slopes, levees, roads/rails, landfills or pipelines.
The MuST SMARTGeoTex Fabric sensor is fully compatible with the MuST system and can be combined with other MuST sensors, such as Temperature, Deformation, Tilt and Acceleration (vibration) sensors.