Method and apparatus for detecting incongruities, such as air bubbles, in fluid material

Abstract From the Canadian patent

Method and apparatus for detecting contaminants including, emboli, in a fluid sample prior to sample testing wherein fluid, density sensors are arranged on opposite sides of a fluid segmenting valve to provide electrical signals indicative of the degree of optical opacity of the fluid flowing through the sensors. The derived signals are compared against a diluent reference level signal to provide resultant signal outputs indicating to an operator or a monitoring device the presence or absence of emboli or other contaminants within the segmented portion of the fluid.