Electric and electronic measuring apparatus, particularly flowmeters, apparatus for measuring viscosity, apparatus for the measurement of density; apparatus for measuring the composition of a polyphased product; apparatus and instruments for signaling and monitoring, transmission and playback of data and signals; regulating apparatus, in particular electric and electronic regulating apparatus for regulating process and quality parameters; software for the commissioning, monitoring, control, maintenance and operation of the above-mentioned apparatus for measuring and regulation; all the above-mentioned products in the field of measuring and automation technology, environmental measurement technology, particularly in the field of the fresh water and sanitation industry, beverage and food industry, chemical industry, pharmaceutical industry, oil and gas industry, nuclear industry, paper industry and basic industry