MEMS Tilt Beam
Geosense® MEMS Tilt Beams are used to measure tilt or differential settlement on structures and infrastructure. The can be mounted horizontally or vertically and are best used as chain of beams that can pick up differential displacement over the chain.
A highly accurate MEMS sensor and operation circuitry is sealed in a weathertight enclosure and mounted on a rigid GRP beam. The GRP beam has a very low coefficient of thermal expansion, reducing thermal effects on measurement.
The design of the beam and end fixings means the beam can easily be cut to any length on site to accommodate any unexpected changes or constraints.
Each unit is individually calibrated to provide the ultimate in system accuracy and repeatability. It can be used in conjunction with a hand-held readouts or automatic data acquisition systems. Units are typically supplied with a RS485/Digital BUS output.
Applications
- Monitoring tilt in retaining walls, diaphragm walls, concrete dams, party walls, structures and bridge piers
- Differential displacement within tunnels
- Monitoring of displacement of structures during compensation grouting
Features
- Uniaxial or Biaxial configurations
- Low sensativity to thermal expansions
- MEMS sensors are resistant to long term drift
- Beamlength can be changed on site.
- Integral temperature sensors
Specifications
| Models |
IPTB-M 5-V-1-485 |
IPTB-M 5-H-1-485 |
IPTB-M 10-V-1-485 |
IPTB-M 10-H-1-485 |
IPTB-M 15-V-1-485 |
IPTB-M 15-H-1-485 |
| Range | ± 5° | ± 5° | ± 10° | ± 10° | ± 15° | ± 15° |
| Axis | Uniaxial | Uniaxial | Uniaxial | Uniaxial | Uniaxial | Uniaxial |
| Orientation | Vertical |
Horizontal |
Vertical | Horizontal | Vertical | Horizontal |
| Accuracy |
±0.0013° ±4.68 arc sec ±0.02 mm/m ±0.013% FS |
±0.0013° ±4.68 arc sec ±0.02 mm/m ±0.013% FS |
±0.002° ±7.2 arc sec ±0.035 mm/m ±0.01% FS |
±0.002° ±7.2 arc sec ±0.035 mm/m ±0.01% FS |
±0.004° ±13.5 arc sec ±0.065 mm/m ±0.0125% FS |
±0.004° ±13.5 arc sec ±0.065 mm/m ±0.0125% FS |
| Resolution |
0.0005° 2 arc sec 0.01 mm/m 0.005% FS |
0.0005° 2 arc sec 0.01 mm/m 0.005% FS |
0.0005° 2 arc sec 0.01 mm/m 0.005% FS |
0.0005° 2 arc sec 0.01 mm/m 0.005% FS |
0.0005° 2 arc sec 0.01 mm/m 0.005% FS |
0.0005° 2 arc sec 0.01 mm/m 0.005% FS |
| Repeatability |
±0.002° ±7.2 arc sec ±0.34 mm/m ±0.02% FS |
±0.002° ±7.2 arc sec ±0.34 mm/m ±0.02% FS |
±0.002° ±7.2 arc sec ±0.34 mm/m ±0.02% FS |
±0.002° ±7.2 arc sec ±0.34 mm/m ±0.02% FS |
±0.002° ±7.2 arc sec ±0.34 mm/m ±0.02% FS |
±0.002° ±7.2 arc sec ±0.34 mm/m ±0.02% FS |
Shared specifications
| Operating Temperature | -40 to +85°C |
| Thermal Stability | ±0.005% FS/°C |
| Supply Input | 8-15 V DC |
| Output Signal | RS-485/digital Bus |
| Output Units | Sine of angle |
| Sensor Type | MEMS |
| Beam Dimensions | 50 x 50 x 6 mm L Section |
| Beam Length* | 0.5, 1 or 2 m |
| Material | GRP / Aluminium |
| Sensor Enclosure | Aluminium |
| Enclosure rating | IP 67 |
*Beams can be manufactured to other lengths if required, beam can be cut to length on site.
