  Materials for time measurement represent a new class of functional materials,
that can be used to fabricate a variety of devices useful for industrial
applications, like for example the shelf-life indicators, solid-state
chronometers, compact detonators, etc. Materials for time measurement require
to have a continuously self-changing property that vary linearly during the
time. The particle-settling phenomenon can be advantageously used to fabricate
this type of materials. A theoretical model based on simple fluid-dynamics
considerations for Newtonian fluids has been developed to obtain the temporal
evolution of the electrical conductance for these materials, in order to verify
its linear behaviour.
