G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 27/414 (2006.01)
Patent
CA 2354424
The invention relates to a device for (1) for measuring the concentration of ions, notably of hydrogen (H+) ions, in a measuring liquid using at least one ion-sensitive field effect transistor (pH-ISFET)(2) which is integrated into an electric circuit within the device (1) in such a way that said circuit emits an output signal (U pH) which serves as measure of the ion concentration in the measuring liquid. To provide a circuit which is as simple as possible and in particular comprises as few components as possible, the invention provides for the at least one pH-ISFET (2) to be bridge-connected with at least three resistors (R1, R2, R3).
L'invention concerne un dispositif (1) qui permet de mesurer la concentration des ions, notamment des ions hydrogène (H<+>), dans un fluide au moyen d'au moins un transistor à effet de champ sensible aux ions (pH-mètre à ISFET) (2). Ledit transistor est intégré à un circuit électrique de façon que celui-ci génère un signal de sortie (UpH) correspondant à la mesure de la concentration ionique dudit fluide. Afin que le circuit soit le plus simple possible et notamment ne comporte que peu de composants, le transistor du pH-mètre à ISFET (2) est connecté avec au moins trois résistances (R1, R2, R3) de façon à former un montage en pont.
Endress + Hauser Conducta Gesellschaft Fur Mess- Und Regeltechni
Gowling Lafleur Henderson Llp
LandOfFree
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