Patent ID: 6774616
Filing Date: 2004-08-10
Classification: B01L,G01N

Abstract:
A system for detecting fluids in a microfluidic component (1) having the following features:The microfluidic component (1) has at least one microchannel (4) including a limitation wall (3) which has two surfaces (3â€², 3â€³) which, facing the microchannel (4) in a transparent area, are inclined towards each other at an acute angle, a photo transmitter (6) and a photo receiver (7) which are disposed outside the component (1) are directed to the inclined surfaces (3â€², 3â€³) in the transparent area of the limitation wall (3) in such a way that if a gas is waiting in the microchannel (4) on the two surfaces (3â€², 3â€³) a light ray emitted by the photo transmitter (6) impinges on the photo receiver (7) following a total reflection on the two surfaces (3â€², 3â€³) and, if a liquid is waiting in the microchannel (4), enters the microchannel (4) on at least one of the two surfaces (3â€², 3â€³) and, as a result, the incidence of light into the photo receiver (7) is reduced or prohibited.