Digital Bus In-Place Inclinometer System

NOTE: This is a legacy and discontinued product not available for order.

Digital Bus In-place MEMS Inclinometer Systems (IPI) are designed to measure lateral movement of inclinometers when remote and continuous monitoring is required.

Recommended alternative


NOTE: This is a legacy and discontinued product not available for order.

Each IPI employs MEMS accelerometer sensors housed inside a 31.75 mm (1.25 in.) diameter, water-tight, 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 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 casing.

The sensors are read through a connectorized signal cable designed to chain together multiple sensors. A datalogger 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.

Digital Bus In-Place Inclinometer System Specifications


Range ±15°
Resolution ±1 arc sec. (±0.0003°) (0.004 mm/m)
Non-linearity ±0.0125% F.S. (±0.002°) (0.03 mm/m)
Repeatability ±0.0125% F.S. (±0.002°) (0.03 mm/m)
Sensor MEMS (Micro-Electro-Mechanical Systems) Accelerometer – Triaxial
Sensor Offset +/- 0.002 arc deg./deg. C
Sensor Sensitivity +/- 0.013 % of reading/deg. C
Supply Voltage 8 – 15V DC
Operating Temp. -40 to 60°C (-40 to 140°F)
Ingress Protection IP68 to 200m H20 (2 MPa)


Gauge Length 0.5 – 3 meters
Housing Diameter 31.75 mm (1.25 in.) (sensor)
Wheel Assembly 70 mm (2.75 in.)
85 mm (3.34 in.)
Bay Rod Diameter 25.4 mm (1.0 in.)

The Digital Bus In-Place Inclinometer System is ideal for monitoring of:

  • Stability adjacent to excavations or underground workings
  • Dams and embankments
  • Landslides
  • Deflection of piles, piers, abutments, or retaining walls.

File Name

Digital Bus In-Place Inclinometer System

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Language Version Download
English ICB0044F
Spanish ICB0048D

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I’m very happy with the quality of the instrumentation and technical support from RST, as always. They worked with us from the initial stages of the project to ensure that we were fully prepared and equipped to use the RSTAR network for the first time. They delivered everything within the tight project time frame to ensure that there were no delays on site, and the submersible tilt meters looked like new even after over twelve months of being submerged in Thames water!
-Richard Lipscombe, BEng (Hons), Director & Principle Consultant - RL Geotechnical Ltd