Fluid stop for measured sample containment

摘要

A test cartridge (100) includes an input channel (110) to receive a liquid sample to be tested. A sample chamber (145) is coupled to the input channel to receive the sample. An air permeable membrane (150) is coupled between the sample chamber (145) and ambient (160) to prevent passage of the sample past the membrane (150) and stop movement of the sample in the sample chamber (145).