This in-place 3D inclinometer with settlement (IPIS) system is used wherever lateral movement along with settlement/heave is to be monitored in a borewell or on a structure. It finds wide application in the measurement of lateral movement and settlement in soil, earthworks, slopes or structures like retaining/diaphragm walls, embankment, deep foundations or dams etc. It is also very useful in monitoring landslide areas.

IPIS is designed to provide significant quantitative data on the magnitude of lateral movement along with settlement or heave and its variations with time. It also provides the pattern of deformation, zones of potential danger and effectiveness of construction control measures undertaken. Its data logging and real-time monitoring feature help to provide early warning in case of failures.

The system consists of a string of probes positioned inside the inclinometer casing in a continuous array to span the movement zone. Each probe basically comprises of a high accuracy biaxial MEMS sensor to monitor inclination or lateral movement (X-Y) and a contactless magnetic sensor to monitor settlement or heave (vertical movement-Z), housed in a waterproof stainless steel enclosure. These sensors measure the tilt and settlement in successive segments to accurately monitor a change in the profile (x-y-z) of the inclinometer casing. The real advantage of IPIS is that it allows online monitoring of transverse movement as well as settlement using the same borehole. This was not possible until now using presently available instruments.

This digital inclinometer system consists of a traversing type digital biaxial tilt-sensing probe and a reel unit. The reel unit contains a winding reel that holds the cable and a wireless Bluetooth relay unit that transmits the probe data to the data logger. A rechargeable battery in the reel unit supplies power to the whole system. Operating cable graduated at every 0.5 m (2 ft) includes a high tensile straining member and is supplied with an easy to carry reel.
The probe is designed to use all standard inclinometer casings i.e. with OD 70 mm (2.75″) & 85 mm (3.34″).

Mobile Readout Unit
The mobile phone readout uses a wireless Bluetooth connection to communicate with the inclinometer reel unit.

This is the most advanced 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 wireless IPI system basically consists of an array of digital inclination sensors, placed inside the inclinometer gage well. The IPI sensor array is interfaced with the wireless network through a Node that allows sensors to send recorded data to the Gateway through a long-range radio frequency wireless communication network. The Gateway then uploads all the collected sensor data to the central/cloud server. This model consists of tilt sensors with both SDI-12 and Modbus output, making it more versatile for different types of dataloggers.

​A single 3 conductor bus cable is threaded in a daisy chain fashion connecting each digital IPI sensor to its next immediate neighbor and finally to the top of the borehole and directly to the wireless communication network through a Node. This has great advantages at locations with a large number of sensors in a borehole, as it eliminates the hassle to accommodate a large number of individual signal cables inside the borehole. The wireless system adds to this advantage by eliminating the need for running lengthy cables across large sites.

The design allows each sensor to move independently to each other without influence from the sensors above or below. This provides a profile of displacement over the complete length of the installation.