Patent ID: 8072602

Claim:
A detection arrangement for detecting presence of an analyte in a sample, comprising a processor, a memory, a display, a color measuring device, and means for maintaining a constant temperature or a temperature profile of said sample, said memory, said display and said color measuring device being arranged to communicate with said processor, said color measuring device being arranged to generate light signals, to send said light signals to said sample, to receive return light signals from said sample, to convert said return light signals into color signals and to send said color signals to said processor, said processor being operated by instructions stored in said memory and being arranged to calculate a value of a composite parameter Z in accordance with a following equation: Z = âˆ‘ i = 1 n â¢ â¢ w i â¢ x i where x, is a color signal i and w, is a corresponding weighing factor and i is an index ranging from 1 to n and n is an integer equal to the number of color signals, wherein the means for maintaining a constant temperature or a temperature profile of said sample is a transparent plate coated with titanium dioxide to which electrodes are attached.