The science that studies the stability of landslide slopes is certainly an extremely complicated and interesting branch of geotechnics. Understanding how a landslide slope will behave over time requires in-depth studies and the correlation of multiple data and observations. This section contains all those instruments used for monitoring landslides and studying slope stability. Useful for creating alarm systems, including early warning ones, the instruments in question are depth strain gauges, tiltmeters for monitoring landslides, surface strain gauges, avalanche sensors and many other instruments useful for providing data that give indications on the stability of the slopes.
The instruments collected here can be divided into two groups, those used for monitoring slow movements and those that identify fast movements. The monitoring of groundwater levels is also often a key element for estimating the stability of slopes, groundwater level sensors and pressure transducers are within the category dedicated to hydrogeology.