Patent ID: 7935938
Filing Date: 2011-05-03
Classification: G01N

Abstract:
1. An apparatus for measuring the amount of fluorescent material in a liquid, the apparatus comprising a measurement chamber having a measurement window through which an excitation signal is transmitted and fluorescent light is detected, wherein the measurement window is a single component comprised of a single material and having a continuous inner face located within the measurement chamber through which both the excitation signal is transmitted and the fluorescent light is detected, and wherein the measurement window has a continuous outer face opposed to the inner face and located outside the measurement chamber and through which both the excitation signal is transmitted and the fluorescent light is detected, excitation means for generating said excitation signal and a detector for receiving said fluorescent light, wherein the apparatus further includes an ultrasonic transducer coupled to the measurement chamber and having at least one channel formed therein, said at least one channel opening onto said measurement window, wherein a light guide is at least partially inserted into said at least one channel, the light guide being arranged either to deliver the excitation signal into the chamber through the measurement window, or being arranged to carry fluorescent light from the chamber.