Conductivity probe and dialysis machine comprising the probe

Details Conductivity probe and dialysis machine comprising the probe Conductivity probe and dialysis machine comprising the probe

G - Physics

01

N

G01N 27/02 (2006.01) B01D 61/32 (2006.01) G01N 27/08 (2006.01) G01R 27/22 (2006.01)

Patent

CA 2659185

A probe (1) for measuring the conductivity of a solution comprises a hydraulic part and an electronic part; the hydraulic part comprises a conduit (2) in the shape of a double tuning fork having an inlet (3) and an outlet (4) for the solution whose conductivity is to be measured; the electronic part comprises an energizing toroidal coil (7) and a receiving toroidal coil (22), both fitted round the conduit (2); the receiving coil (22) is mutually concatenated with the energizing coil (7) through an electromagnetic flux (F) generated by the energizing coil (7) in the respective toroid (Tl) and through the solution circulating in the conduit (2); the probe (1) also comprises a feedback circuit (111) to keep the electromagnetic flux (F) constant.

L'invention concerne une sonde (1) permettant de mesurer la conductivité d'une solution et comportant une partie hydraulique et une partie électronique. La partie hydraulique comporte un conduit (2) sous la forme d'un double diapason muni d'une entrée (3) et d'une sortie (4) pour la solution dont la conductivité doit être mesurée. La partie électronique comporte une bobine toroïdale d'excitation (7) et une bobine toroïdale de réception (22), les deux étant ajustées autour du conduit (2). La bobine de réception (22) est mutuellement concaténée avec la bobine d'excitation (7) à travers un flux électromagnétique (F) généré par la bobine d'excitation (7) dans le toroïde respectif (T1) et à travers la solution circulant dans le conduit (2). La sonde (1) comporte également un circuit de rétroaction (111) pour maintenir constant le flux électromagnétique (F).

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