Measures displacements between two points in close proximity. Used for monitoring of joint openings, existing crack opening and other relative movements.
REPP-R Potentiometer Jointmeter
The REPP-R is a potentiometer jointmeter transducer for remote monitoring of traction or compression movement such as discontinuities of rock mass or blocks, construction joints in concrete, and expansion joints of steel structures. It has a rugged stainless steel housing and the ball joints allow for a degree of shearing motion. REPP-R is available in three different ranges: 25, 50 and 100 mm with respectively 207.5, 245 and 320 m base lengths at mid-range.
JM Series Vibrating Wire Jointmeter
The JM Jointmeter is used for monitoring displacement between concrete lifts in concrete dams. Manufactured with rugged construction, it consists of a vibrating wire displacement transducer inside a telescopic stainless steel housing. Easy to install, extremely stable and reliable, it is can also used to monitor separation of shotcrete from a rock face in tunnel walls as well as determining crack and joint movement in structures.
RTF Surface Jointmeter
The RTF is a jointmeter used to measure the displacement of cracks in structures or rock masses. The sensor is housed in a rugged waterproof enclosure which is fitted at one end with a spring-loaded rod resting against the reference surface located on the opposite side of the discontinuity. Supplied with an installation template, the RTF is available in uniaxial (RTF 1D) and triaxial (RTF 3D) versions.
3DeMoN Autonomous Laser Distance Meter
The 3DeMoN Laser Distance Meter has been designed for (semi) permanent installations in any structure or geotechnical situation that requires continuous monitoring of the relative movements of two points, without contact. The 3DeMoN Laser Distance Meter allows to measure absolute and relative distance between the laser head and an appropriate target, up to 1km away and with mm accuracy. Several units can be combined if additional measurements are needed.
FOD Displacement Sensor
The FOD optic linear position and displacement transducer is an absolute position transducer that provides highly precise position and displacement measurements. The FOD is the fiber optic version of the Linear Variable Differential Transformer (LVDT), but unlike it, the FOD requires no electrical signal and associated wiring. The FOD is completely immune to EMI and RFI and carries no risk of current leakage or ignition. The FOD can be located kilometers away from the signal conditioner. These characteristics make the FOD well suited for difficult-to-reach locations and hazardous environments such as those containing explosive materials or prone to lightning strikes.
Our unique design is based on Fabry Perot interferometer principle. By connecting this device to one of our Fabry-Perot fiber optic readout units or dataloggers, it becomes an absolute position and displacement transducer.
Its compact size, immunity to EMI/RFI, resistance to corrosive environments, high accuracy and reliability make it the best choice for linear position and displacement measurements.
SOFO Standard Deformation Sensor
The SOFO deformation sensors are transducers that transform a distance variation into a change in the path unbalance between two optical fibers that can be measured with a SOFO VII Reading Unit.
The sensor is composed of two main parts: active and passive. The active part contains the reference and the measurement fibers and measures the deformations between its two ends.The passive part is insensitive to deformations and is used to connect the sensor to the Reading Unit. The output is terminated with an E-2000 connector with a built in protective cover.The sensors can be quickly and easily surface mounted or directly embedded in concrete and mortars.
MuST FBG Deformation Sensor.
The FBG deformation sensors 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 Reading Units.
The sensor is composed of an active and a passive part. The active part contains the measurement fiber and measures the deformations between its two ends, transforming it into a wavelength shift of the Fiber Bragg Grating. The passive part is insensitive to deformations and is used to connect the sensor to the Reading Unit. In the passive part of the sensor, it is possible to install a loose Fiber Bragg Grating for temperature sensing and compensation.
The sensors are available in single-ended, double-ended and chained configuration. It is possible to connect up to 7 full-range temperature compensated sensors. The sensors are terminated with E2000-APC connectors or on the user‘s specifications.
The sensors can be quickly and easily installed without affecting the construction schedule. They can be directly embedded in concrete and mortars, or surface mounted.