Patent ID: 7525093

Claim:
Fluid sensor containing a fluid cell ( 1 ) to enclose a volume of fluid ( 7 ), i.e. gas or liquid to be analyzed, said fluid sensor comprising an electromagnetic energy source ( 3 ) arranged to transmit electromagnetic waves ( 4 ) into the fluid cell ( 1 ), at least one detector ( 5 ) to detect electromagnetic waves passing through the fluid cell ( 1 ) and situated directly downstream of said energy source ( 3 ) without any curves in said fluid cell ( 1 ), at least one opening ( 2 ) for the inlet/outlet of fluid to be analyzed, and a circuit board ( 8 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ) to evaluate the intensity of electromagnetic waves reaching said at least one detector ( 5 ) and/or to provide the circuitry for the electromagnetic energy source ( 3 ), at least part of the straight fluid cell ( 1 ) being incorporated into the substrate of the circuit board ( 8 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ).