MEMS Digital In-Place Inclinometer System
MEMS Digital In-Place Inclinometer System
MEMS Digital In-Place Inclinometer System
Description
Each IPI employs MEMS accelerometer sensors housed inside a 28.6 mm (1.125 in.) diameter,
watertight, stainless steel enclosure. The sensor body is rigidly connected to a 25.4 mm (1.0 in.)
diameter bay rod which establishes the length of the IPI. Multiple IPIs are assembled with pivots
allowing for sensing of displacement over discreet, configurable intervals. Wheel assemblies centralize
the pivot point and establish the azimuth of each IPI. They are available in sizes to fit 70 mm (2.75 in.)
or 85 mm (3.34 in.) O.D. inclinometer casings.
The sensors are read through a connectorized signal cable designed to chain together multiple
sensors. A data logger is used to monitor the deflection of each sensor on the digital bus. If necessary,
an alarm can be triggered when movement reaches a threshold rate or magnitude.
Designed for ease of installation, serviceability and fast delivery, RST’s In-Place Inclinometer System
comes standard for both biaxial and uniaxial in one model.
SPECIFICATIONS
Range ± 30°
Resolution 0.0002° (0.004 mm/m)1
Sensor Accuracy ± 0.002° (0.03 mm/m)1
Sensor Precision ± 0.0013° (0.02 mm/m)1 ± 0.0005° (0.01 mm/m)2
Sensor 24 h Stability ± 0.03° mm/m1 ± 0.01° mm/m2
± 0.5 mm for 30 m IPI (15 sensors @ 2 m, 6
System Precision
months, repeatability conditions in borehole)
MEMS (Micro-Electro-Mechanical Systems)
Sensor
Accelerometer
± 0.016 mm/m/°C (±0.001°/°C), for ± 5° from
Temperature Dependent Uncertainty vertical ± 0.033 mm/m/°C (±0.002°/°C), for ± 15°
from vertical
Temperature Accuracy ± 0.5 °C (0°C to 60°C) ± 1.0 °C (-40°C to 60°C)
Temperature Resolution 0.06°C
Electrical Specifications
Page 1
RST INSTRUMENTS LTD
Mechanical Specifications
Page 2