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 aim of creating a GNSS-based position measurement system that is robust, simple, cost-effective and accurate.



4DBloc, the accurate, robust and economical GNSS deformation sensor

Requiring no calibration or special maintenance, 4DBloc is a very simple sensor, and unlike other sensors in this family requires no regular maintenance.
It also consumes very little 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 challenging. 4DBloc data is processed by a dedicated, unique and fully automated algorithm to deliver a level of accuracy within a few millimetres, depending on circumstances and location.

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

4DBloc and its 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 gives you:

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

Download the 4DBloc solution datasheet