9 Scientific measuring and checking apparatus and instruments for the in-situ analysis of immiscible liquid mixtures contained in vats, containers, pipes and pipelines; measuring and monitoring apparatus and instruments for inlets and outlets of vats, containers, pipes and pipelines for the in-situ analysis of immiscible liquid mixtures; precision measuring apparatus for the in-situ analysis of immiscible liquid mixtures contained in vats, containers, pipes and pipelines; apparatus for measuring the state of material corrosion, namely, electronic device for eliminating corrosion from vats, containers, pipes and pipelines; chemistry apparatus and instruments, namely, chemistry apparatus and instruments for the in-situ analysis of immiscible liquid mixtures contained in vats, containers, pipes and pipelines; apparatus and instruments for physics, namely, electrical calculators and measuring apparatus for the in-situ analysis of immiscible liquid mixtures contained in vats, containers, pipes and pipelines; sounding apparatus and machines for the in-situ analysis of immiscible liquid mixtures contained in vats, containers, pipes and pipelines; air analysis apparatus; gas analysis apparatus for the in-situ analysis of immiscible liquid mixtures contained in vats, containers, pipes and pipelines; testing apparatus not for medical use for the in-situ analysis of immiscible liquid mixtures contained in vats, containers, pipes and pipelines; apparatus for analyzing corrosion levels, namely, metal strength testing machines, metal hardness testing machines for determining the level of corrosion in vats, containers, pipes and pipelines; cathodic devices for protecting against rust and corrosion, namely, cathodes; electrical regulating apparatus for the in-situ analysis of immiscible liquid mixtures contained in vats, containers, pipes and pipelines; electric measuring apparatus for the in-situ analysis of immiscible liquid mixtures contained in vats, containers, pipes and pipelines; electrical monitoring apparatus for the in-situ analysis of immiscible liquid mixtures contained in vats, containers, pipes and pipelines; pressure indicator plugs for valves; gasometers; hydrometers; hygrometers; fluid quantity indicators in the nature of flow rate monitors; temperature indicators; vacuum gauges; measuring instruments, namely, for the in-situ analysis of immiscible liquid mixtures contained in vats, containers, pipes and pipelines; software for monitoring and controlling flow rates and temperature for use in the field analysis of immiscible liquid mixtures contained in vats, containers, pipes and pipelines analysis; software for analyzing, testing and measuring solid, liquid and gaseous materials for use in the field of oil and gas industries; software for analyzing, controlling and measuring the state of material corrosion for use in the field of oil and gas industries; measuring devices, namely, electrical measuring apparatus for the in-situ analysis of immiscible liquid mixtures contained in vats, containers, pipes and pipelines