INSPECTOR-4 is a portable falling weight deflectometer (LWD) for measuring the ground elastic modulus, maximum deformation, compaction factor, elastic deflection and deformation time. It is ideal for testing in regular or difficult to access areas.
​The deflectometer can be used in design, construction, maintenance and quality control of buildings, subdivisions, roads, railways and other environments to measure elastic modulus of unbound or partially bound material, including asphalt, granular aggregation base, base layers, soil, concrete etc.