GEO-Instruments Products

The Geo-Tiltmeter is a field rugged shock resistant general purpose device. The sensor combines a wide range with high resolution to provide optimum performance for most structural deformation requirements without requiring range adjustment as rotation occurs. The biaxial version allows tilt measurement in two orthogonal planes, minimizing the instrument footprint on project structures, and saving time, money and space on tight installation schedules.

Geo-Instruments High Accuracy Beam Tiltmeter systems provide a proven long term monitoring solution for many structural applications requiring rotation measurements in near real time. They are easily installed and provide a direct method to detect differential movement and rotation in structures. Typical applications include effects of deep excavations and diaphragm wall construction on adjacent existing structures, structural health/long term monitoring applications, deformation monitoring within tunnels, including convergence applications, compensation grout monitoring, remote monitoring of distressed structures and verification of sSOE (Support of Excavation) design assumptions.

Electrolevel Beam Sensors detect differential movement and rotation in structures. Two versions of the beam sensor are available: horizontal for monitoring settlement or heave and vertical for monitoring lateral displacement and convergence. Since the EL beam sensor has a defined gauge length, changes in tilt can be converted simply and accurately to millimetres of movement, regardless of the rigidity of the structure. Linked end to end, beam sensors can provide absolute displacement and settlement profiles.

The Bassett Convergence System is designed to measure delta X and delta Z deformations of structures, in near real time. Primarily used in tunnels, particularly those where clearances are extremely small, the system is robust, simple and proven. The system can be supplied complete with datalogger and BCWin Data management software to display data both as a graphical representation of the tunnel and with X & Z graphs for each point. Using Argus or I-Site monitoring software alarm functionality can be built into the BCS system.

The Portable Digital Tiltmeter system comprises a tiltmeter assembly and a PDA. The tiltmeter contains MEMS accelerometers measuring in X and Y planes, the power supply, analogue to digital converter and a Bluetooth transmitter. Data are transmitted cable-free to the PDA and saved each time a tiltplate reading is taken. The accelerometers measure the angular difference between the sensors axis when held or placed on the tiltplate and the vertical X and Y planes. By recording each tiltplate reading on the PDA, a history of any movement of the tiltplate can quickly be built up. The software on the rugged PDA allows the user to name each tilt plate for easy identification during reading sets.