A chain pin or pin element for connecting chain links together to form a section of a chain for conveying products along a conveyor line or path of a material handling system includes a shaft portion and a head portion at at least one end of the shaft portion. The DCC and the charge integrator are composed of a plurality of switches, one or more sampling capacitor, at least one integrating capacitor and an operational amplifier under test with a single-ended output or differential-ended outputs. The integrated processing box also performs processing, for example, temporalspatial processing or grayscale processing, variably to each type of input device, each type of output device, or each type of storage device. Hence, the present invention provides a convenient way for distant surveillance and alarm of residential areas, smart-type office buildings and factories and, simultaneously, enjoys wireless on-line connection. The invention also includes at least one mechanical connecting part between the motherboard and at least one of the following: a backplane board connected to an avionic connector, an avionic connector and the rear face of the avionics equipment. The silicas are employed, for example, in solvent-containing coatings.