Sensors with or without actuators to measure and optionally control one or more parameters of one or more fluids, liquids, or gases, namely, to measure volumetric flow, mass flow, density, concentration, viscosity, dielectric constant, refractive index, pH, color, dissolved oxygen, level, energy content, heat capacity, content, composition, BRIX sugar content, API gravity, temperature, and other specific quality indicators, used to monitor with optional control the quality or quantity of the ...