Patent ID: 7359055

Claim:
An optical sensor for determining concentration of dyes and/or particles in liquid or gaseous media, comprising: at least one measuring head with a transmitting unit ( 2 ), provided with at least one semiconductor transmitting element ( 9 ) which emits visible light rays ( 8 ), as well as a receiving unit ( 3 ) provided with at least one semiconductor receiving element ( 10 ) onto which the portion of transmitted light rays ( 8 ) is guided which penetrates an absorption section filled with a liquid or gaseous medium; and an evaluation unit ( 6 ) which is connected via electrical supply lines ( 4 , 4 ′) to the measuring head and is used for evaluating the receiving signals present at the output of the semiconductor receiving element ( 10 ) for determining the dye concentration and/or the particle concentration where the transmitting unit ( 2 ) and the receiving unit ( 3 ) are secured to the at least one measuring head defining the absorption section and can be secured adjustably in different positions on the at least one measuring head.