Transducer for microfluid handling system

A sensor for detecting the presence of a first and a second substance in a fluid, said sensor comprising:

• means for handling the fluid, said handling means comprising an interaction chamber of micrometer dimensions, an inlet and an outlet,
• a first flexible member having a surface, said surface holding a first substance, wherein the surface holding the first substance is at least partly positioned inside the interaction chamber so that at least part of the first substance is exposed to the fluid,
• a second flexible member having a surface, said surface holding a second substance, wherein the surface holding the second substance is at least partly positioned inside the interaction chamber so that at least part of the second substance is exposed to the fluid,
• a first detecting means for detecting a first mechanical parameter associated with the first flexible member, said first mechanical parameter being related to the presence of the first substance in the fluid, and
• a second detecting means for detecting a second mechanical parameter associated with the second flexible member, said second mechanical parameter being related to the presence of the second substance in the fluid.

A sensor for detecting the presence of a first and a second substance in a moving laminated fluid, said laminated fluid comprising, in a cross section perpendicular to a direction of movement, a first and a second region, said sensor comprising:

• means for handling the laminated fluid, said handling means comprising an interaction chamber, an inlet and an outlet,
• a first flexible member having a surface, said surface holding a first substance, wherein the surface holding the first substance is at least partly positioned inside the interaction chamber so that at least part of the first substance is exposed to the first region of the laminated fluid,
• a second flexible member having a surface, said surface holding a second substance, wherein the surface holding the second substance is at least partly positioned inside the interaction chamber so that at least part of the second substance is exposed to the second region of the laminated fluid,
• means for detecting a first mechanical parameter associated with the first flexible member, said first mechanical parameter being related to the presence of the first substance in the first region of the fluid, and
• means for detecting a second mechanical parameter associated with the second flexible member, said second mechanical parameter being related to the presence of the second substance in the second region of the fluid.