| abstract |
The invention relates to a microfluidic sensor for analyzing a fluid present in a conduit (3) under a first pressure. The sensor comprises a mixer (M) for mixing a quantity of fluid from the conduit (3) with at least a quantity of reagent (7) from at least one reservoir (6), and an analyzer (A) for analyzing the mixture thus constituted. This sensor further comprises a sampling channel (2) for withdrawing a quantity of fluid in the conduit, for supplying the mixer and for pressurizing the at least one reservoir. According to the invention, an outlet (11) of the analyzer (A) is subjected to a second pressure lower than the first pressure in the conduit, so that the fluid passes passively from the conduit, a part to the analyzer via the mixer, and secondly to the tank (6). |