Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more (G01N3/00 - G01N17/00, G01N24/00 take precedence)

Investigating strength properties of solid materials by application of mechanical stress Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid Aanalysing materials by measuring the pressure or volume of a gas or vapour Investigating density or specific gravity of materials; analysing materials by determining density or specific gravity Investigating flow properties of materials, e.g. viscosity, plasticity; analysing materials by determining flow properties Investigating surface or boundary effects, e.g. wetting power; investigating diffusion effects; analysing materials by determining surface, boundary, or diffusion effects Investigating characteristics of particles; investigating permeability, pore-volume, or surface-area of porous materials Investigating resistance of materials to the weather, to corrosion, or to light Investigating or analysing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects