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10. Electrical conductivity or resistivity measurement systems
10.1 Method principle and applications
The principle consists in measuring the electric current flowing between two electrodes, or between an electrode and the metallic mass of a tank, when the product, necessarily conductive, touches and closes the circuit. Gases or vapors are insulating at normal operating temperatures. The amplified current is used to operate a threshold relay. With rare exceptions, this method is reserved for the detection of one or more thresholds.
High-purity water has a conductivity of less than 0.05 µS.cm –1 , but it can still be detected with high-performance, expensive conductivity meters whose use for this application, except in special cases, is questionable. Hydrocarbons, like many...
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Electrical conductivity or resistivity measurement systems
Conclusion
Bibliography
Websites
Online course on level measurement using radar technology :
https://academy-online.krohne.com/elearning/fr/cours/mesure-de-niveau-radar/
Engineer's Garage: level sensors :
...Standards and norms
- Radiation protection – Sealed radioactive sources – General requirements and classification - ISO 2919 - 2012
- Tanks for transporting hazardous materials – Tank service equipment – Fill limiters for liquid petroleum fuels - NF EN 13922 - 2011
The catalog of Iso and Afnor standards can be consulted online on the Afnor website: http://www.afnor.fr
...Regulations
Arrêté du 8 juillet 2003 relatif au contrôle métrologique des récipients-mesures. NOR : INDI0301736A
Decision no. 09.00.110.003.1 of October 21, 2009 relating to calibration resources in the field of static and dynamic liquid measurement.
Arrêté du 24 mars 2009 relatif aux jaugeurs. NOR : ECEI0906617A
Decree no. 2002-460 of April 4, 2002 on the general...
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French Nuclear Safety Authority (ASN): https://www.asn.fr
European Committee for Electrotechnical Standardization (CENELEC): https://www.cenelec.eu
Institut national de l'environnement industriel et des risques (INERIS): https://www.ineris.fr...
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