Patent ID: 9581542
Date: 2017-02-28
CPC Classifications: F01N,G01N

Claim:
1. A device for detecting the concentration of urea in solution with water, comprising: a means for emitting radiation; at least one means for receiving radiation, which is configured for detecting a value of intensity of radiation; a light guide, which is prearranged for optically connecting said emitting means to said receiving means, wherein said light guide has at least one surface that is to come into contact with said solution so as to determine an interface of separation between said light guide and said solution, control means configured for obtaining a value indicating the concentration of urea in said solution as a function of the signal coming from said receiving means; said light guide having a general U-shaped development and the elbow-shaped portion of said guide defining at least part of said surface that is to come into contact with said solution; said emitting means configured for emitting radiation in at least one first range of wavelengths and one second range of wavelengths that are different and said receiving means is configured for detecting radiation in the said first range and said second range; said control means configured for obtaining a value indicating the concentration of urea in said solution as a function of a first signal coming from said receiving means, for said first range of wavelengths, and for verifying whether said value indicating concentration and a value of intensity of radiation derived from a second signal coming from said receiving means, for said second range of wavelengths, satisfy a given function, characteristic of said solution, for said second range of wavelengths.