Patent ID: 8767213

Claim:
A turbidity sensor for measuring the turbidity of a fluid, comprising: a light source for emitting light at an initial radiant intensity, wherein the initial radiant intensity is variable; and a light-sensitive element for receiving light emitted from the light source, the light source and the light-sensitive element being positioned relative to each other so that, when the light source is in operation, light emitted from the light source propagates through the fluid on its way to the light sensitive element, which light-sensitive element is configured to measure a received radiant intensity of light received at the light-sensitive element, wherein a controller is communicatively coupled to the light source and the light-sensitive element, the controller being configured to: determine the initial radiant intensity of the light emitted by the light source; and adjust, by selecting one intensity level out of a plurality of predetermined intensity levels, the initial radiant intensity for the light emitted by the light source to an updated initial radiant intensity based on the determined initial radiant intensity of the light emitted from the light source and the measured received radiant intensity of light received at the light-sensitive element.