Wireless In-Place Inclinometer (IPI) System

This unit is a wireless in-place inclinometer (IPI) system, designed to measure the lateral movement of earthworks or structures. The IPI is used in critical applications where real-time monitoring and early warning are required in order to protect life and valuable assets.


​The in-place inclinometer system consists of a string of digital tilt sensors. The string of tilt sensors is positioned inside the inclinometer casing to span the movement zone. Each tilt sensor is fitted with a pair of pivoted sprung wheels. The unit consists of tilt sensors with SDI-12 output.

​The tilt sensors are connected through a single 3 conductor bus cable in a daisy chain fashion, connecting each sensor to its next immediate neighbor and finally to the top of the borehole and directly to a suitable datalogger. This has a great advantages at locations with large number of sensors in a borehole, as it eliminates the hassle to accommodate large number of individual signal cables inside the borehole.

The ESDL-30 datalogger can be used with this IPI system.

Sensor : Uniaxial or biaxial sensor
Measuring range : ± 15°
Accuracy1 : ± 0.1% fs
Resolution : ± 0.05 mm/m (8 arc seconds)
Output : SDI-12 output
Temperature range : -20°C to 80°C

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Equipment Rental

GDS has a variety of instruments for hire, these Instruments, Readouts and Dataloggers are available for product hire on a short-term (fortnightly) or long-term (monthly) basis including, but not limited to, the following:

  • Load cells
  • Tilt meters
  • Manual Readout units
  • Dataloggers
  • Tiltmeters
  • Inclinometers