Probe assembly for a fluid condition monitor and method of...

G - Physics – 01 – N

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G01N 27/00 (2006.01) G01N 27/22 (2006.01)

Patent

CA 2473546

A probe assembly for use in monitoring fluid conditions in real time in a transducer utilizing impedance spectroscopy and having two closely spaced tubular concentric electrodes. The electrodes have a surface area of about 8.1 to 10.8 cm2 spaced in the range of about 0.1 to 0.55 mm. In one embodiment a concentric outer tubular Faraday shield is employed for monitoring fluid in a non-metallic vessel. The probe assembly is particularly suitable for monitoring hydraulic fluid including automatic transmission fluid and mineral based engine oil for diesel and gasoline engines.

La présente invention concerne un ensemble de sondes destiné au contrôle des états d'un fluide en temps réel dans un transducteur utilisant la spectroscopie d'impédance et comportant deux électrodes concentriques tubulaires rapprochées. Les électrodes présentent une surface active d'environ 8,1 à 10,8 cm?2¿ espacées d'environ 0,1 à 0,55 mm. Dans un mode de réalisation, une cage de Faraday tubulaire concentrique externe est utilisée pour le contrôle de fluide dans un récipient non métallique. L'ensemble de sondes est notamment apte au contrôle de fluide hydraulique y compris du fluide de transmission automatique et d'huile de moteur à base minérale pour des moteurs diesel et à essence.

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