4DBloc is a GNSS-based sensor that provides real-time monitoring of ground surfaces and built structures.

4DBloc was developed and tested in cooperation with the French National Institute of Geographic and Forest Information (IGN) with the shared purpose of creating a GNSS-based position measurement system that is robust, simple, cost-effective, and accurate.



Accurate, Robust, and Economical GNSS Deformation Sensor

4DBloc is a very simple sensor that does not require calibration or special maintenance, and unlike other sensors, it does not require maintenance.

It also does not consume much energy and can be powered by a single solar panel installed at the same time.

It is the ideal instrument for the long-term monitoring of locations where access is a challenge. 4DBloc data is processed by a dedicated, unique, and fully automated algorithm to deliver a level of accuracy within a few millimeters, depending on circumstances and location.

capteur 4DBloc de SIXENSE
4DBloc  Capteur de déformation GNSS de SIXENSE

4DBloc's Applications

4DBloc applications include:

  • Transport infrastructures: bridges, rails, roads, etc.
  • Hydraulic infrastructures: dams, coastal defences, harbours, etc.
  • Historic buildings and monuments
  • Mines

Principle of Operation

4DBloc Capteur de déformation GNSS de SIXENSE
4DBloc Capteur de déformation GNSS de SIXENSE

The 4DBloc Solution Provides:

  • A robust system with a small footprint and low power consumption
  • The best GNSS-based deformation system on the market
  • Unrivaled cost value 

Download the 4DBloc Solution Datasheet