G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 5/04 (2006.01) G01N 15/06 (2006.01)
Patent
CA 2405358
An apparatus (10) for measuring the mass of a substance includes a sensor (12) having a membrane layer (14), the membrane for receiving the substance thereon, an oscillator device (20) for driving the membrane at a reference resonant frequency, a frequency detection device (24) for determining a change in the reference resonant frequency caused by the presence of the substance on the membrane and a mass determining device (26) for determining the mass of the substance, the change in the reference resonant frequency being indicative of the mass of the substance. The apparatus may be used to determine the concentration of the substance within a volatile solution, to determine the moisture content of the substance, and to determine the boiling point of the substance. Image
Un appareil permettant de mesurer la masse d'une substance comprend un capteur possédant une couche membranaire, cette membrane recevant ladite substance, un dispositif oscillateur permettant de conduire cette membrane à une fréquence résonnante de référence, un dispositif de détection de fréquence permettant de déterminer une modification dans la fréquence résonnante de référence causée par le présence de la substance sur la membrane, et un dispositif de détermination de masse permettant de déterminer la masse de cette substance, la modification de la fréquence résonnante de référence indiquant la masse de cette substance.
Cunningham Brian T.
Williams John R.
Macrae & Co.
The Charles Stark Draper Laboratory Inc.
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