Patent ID: 8096314

Claim:
A fluidic device, comprising: a fluidic module comprising a first fluid chamber with a fluid outlet, a second fluid chamber with a fluidic access, and a fluidic connection between the fluid outlet of the first fluid chamber and the fluidic access of the second fluid chamber, wherein the second fluid chamber is fluidically connected only to the first fluid chamber and otherwise is fluidically closed; and a drive formed to impart the fluidic module with a first rotation at a rotational frequency below a rotational frequency threshold and a second rotation at a rotational frequency above the rotational frequency threshold, wherein the first and second fluid chambers and the fluidic connection are formed such that, in the case of rotation at a rotational frequency below the rotational frequency threshold, a fluidic closure is formed by the liquid at the fluidic access to the second fluid chamber, and a liquid column comprising a radially exterior meniscus on which gas located in the second fluid chamber exerts a back pressure decisive for the liquid column to remain stable is generated in the first fluid chamber, and in the case of rotation at a rotational frequency above the rotational frequency threshold, the liquid column becomes unstable so that liquid enters the second fluid chamber and gas escapes through the liquid column.