SENSOR HOUSING AND REAGENT CHEMISTRY

摘要

A sensor comprises a sensor housing, having a channel; a porous substrate, in the channel; an analysis chemistry reagent, on the porous substrate; and a nozzle, in fluid connection with the channel. The porous substrate fills a cross section of the channel, and the cross- sectional area of the channel at the porous substrate is greater than the cross-sectional area at the nozzle.