In part I, we analyzed application of sensing elements made from composites for registration of ultraviolet and visible photons. Another area of application of such sensors is the detection of elementary particles, for example, electrons at the energies of more than 100 eV, muons, pions, etc. When running through the composite dielectric materials, these particles produce clusters of secondary electrons. The secondary electrons which are located close to the surface of composite material and have a kinetic energy higher than several electron-volts can, in principle, leave the materials and be independently detected. There are different constructions of the detectors of secondary electrons. One of the simplest detectors is a parallel-plate chamber. The detector based on a chamber of this kind can be constructed of a practically unlimited area, and that is of great importance for many applications. We analyze application of porous and needle composite structures placed in a parallel-plate chamber for detection of particles of high energy.