Measurand ShapeArray (SAAV)

Product Information

The Measurand ShapeArray is a device whose design has been updated to enable faster and simpler installation into conventional inclinometer casing. It is used to monitor deformation of soil and structures like dams, tunnels, walls, and buildings.

ShapeArray is an automated shape-measuring, inclinometer-style instrument on a reel, which has set a new standard for ease of installation. ShapeArray data is available in real-time, enabling engineers and designers to reduce risk and save money by making smarter, faster decisions.

Product Features

• Installation Vertical, Arc, Horizontal
• Segment length 250 mm or 500 mm (joint center to joint center)
• Standard length of SAAV Up to 150 m (500 mm segments)
• Up to 50 m (250 mm segments)
• Up to 30 m (with convergence installation kit)
• Custom length of SAAV Over 150 m (Contact Measurand for details)
• Conduit and Casing inside diameters 27 mm, 47 mm to 100 mm
• Joint diameter 19 mm
• Length of unsensorized near cable end segment 500 mm
• Length of fiberglass extension 1 m or 2 m
• Length of communication cable Standard 15 m
• Weight:
• 0.2 kg/segment for ShapeArray less than or equal to 90 m
• 0.3 kg/segment for ShapeArray over 90 m
• Minimum axial compression to provide snug fit in casing 30 kgf
• Maximum joint bend angles 90°
• Storage temperature -40°C to 60°C
• Installation temperature -20°C to 60°C
• Operating temperature -35°C to 60°C polynomial temperature algorithm corrected
• Waterproof to 2000 kPa (200 m Water)
• Power requirements:
• 12 VDC (12–16.5) at 1.8 mA/segment
• 12 VDC (12–16.5) at 0.4 mA/segment (low power mode)
• Angular range of MEMS sensors ± 360° (software selection required for 2D/3D modes)
• Range of 3D mode(vertical) ± 60° with respect to vertical
• Resolution 0.00067° (0.012 mm/m)
• System precision ± 0.5 mm for 30 m SAAV
• Segment precision:
• ± 0.0005° (0.01 mm/m) (68% confidence interval)
• ± 0.0050° (0.09 mm/m) (99.7% confidence interval)
• Sensor 24h stability:
• ± 0.01 mm/m (68% confidence interval)
• ± 0.03 mm/m (99% confidence interval)
• Azimuth error in joints < ±0.01

Product Benefits

• New joint design enables the instrument to zigzag into various casing sizes
• Contains upgraded MEMS sensors that reduces power consumption and improve resolution
• Available with 250 and 500 mm segment length, up to 150 meters long

Typical Applications Include:

• Designed to be installed into existing casings which eliminates the need to drill new boreholes when converting from manual to automated monitoring
• Settlement
• Lateral deformation
• Convergence monitoring
• Slope monitoring
• Slurry wall monitoring
• Excavation deformation monitoring