Under its brand name CITA, ELTA has been developing over the last 10 years specific expertise in physicochemical analysis. It covers the following range of measurements: Measurement of dissolved oxygen: ELTA's apparatus enable trace measurements in the waters of thermal power plants. The range covers all requirements: • CITA 2011 portable dissolved oxygen analyzer, • CITA 2060 fixed dissolved oxygen analyzers for high-performance measurement with optimum investment costs, • CITA 2021 dissolved oxygen measurement controller (automatic calibration). Measurement of gaseous oxygen: • CITA 2070: measurement of gaseous oxygen in severe environments (100% relative humidity, Ex, vibrations, mandatory confinement of gases, etc.). Measurement of dissolved hydrogen: • DH102 for measurement of dissolved hydrogen at high values (cc/Kg) under pressure (165 bars). ELTA also proposes analyzers: • for low-pressure measurements (trace measurements at highest values), • measurement by sampling by chromatographic analysis. Measurement of sodium: • CITA 2340: trace sodium monitoring controller (automatic calibration). Measurement of chlorines: • CITA 2920: trace chlorine monitoring controller (refrigeration of sample and automatic calibration). Other physicochemical measurements proposed by ELTA: • measurement of gaseous hydrogen on AC generator circuits (risk of explosion or hydrogen purity), • measurement of hydrazine, • measurement of latent defects on oil transformers (exclusive representation: GE SYPROTEC Inc.), • analysis of heavy metals and mercury (exclusive representation: MERCURY Instruments GMBH), • analyzer for the environment: - analysis of river waters (multiparameter sensor), - analysis of residual waters and wastewater (DBO, DCO, COT, NH4, etc.) (exclusive representation: Isco STIP). Measurements • Heavy metals analyser (AML) • CITA2021 • Dissolved oxygen automat (OCA2020A) • Gazeous effluents oxymeter (OEG2070) • Sodium analyser (SCA2340) • Dissolved oxgen analyser (AOD2060) • Dissolved hydrogen analyser (DH102) • Continuous monitoring of hydrogen (HYDRAN202)