Fluid control for environmental sensors is just one way micropumps can support sensor systems. In addition to quick transport of ambient air to the sensor, it can compensate for sensor drift by supplying calibration gases. Regeneration of the sensor membrane by bakeout can be supported with negative pressure. By defined pressure variation at the sensor, specific gas determination can be enabled for VOC gas sensors with AI assisted training. Furthermore, pressure drops at protective filters or supply lines can be overcome, or with the help of a preconcentrator technology also the ppb range can be developed.