Patent ID: 7389132

Claim:
An apparatus for analyzing parameters in a volume with V=V(t), where t is time, said volume comprising a plurality of substances; the apparatus comprising: a first signal source A=A(t), said first signal source being representative of a first substance comprising the volume; a second signal source B=B(t), said second signal source being representative of a second substance comprising the volume with A(t)=B(t)K 0 , where K 0 >1, V(t)=B(t)K 1 , where K 0 , K 1 are stationary in a time interval t 0 , where t 0 is any real value; and a first detector to measure a first signal assigned as C′(t) according to the time interval t 0 , where C′(t) can be either V′(t) related to the volume by V′(t)=V(t)+N V (t) or A′(t) related to the first signal source by A′(t)=A(t)+N A (t), wherein N A (t) is the noise of A(t), and N V (t) is the noise of V(t) during the measurement time interval t 0 , a second detector to measure a second signal assigned as B′(t) according to a time interval t 0 , where B′(t) is related to the second signal source by B′(t)=B(t)+N B (t), wherein N B (t) is the noise of B(t) during the measurement time interval t 0 , wherein the first and second signals C′(t) and B′(t) are transferred into electro optical signals by a signal converter and sent into a data processor to analyze either K 0 for determining the concentration of the second substance with respect to the first substance or K 1 for determining the concentration of the second substance with respect to the volume.