Gerät mit Mikrofluidaktor

The invention relates to a device (1) comprising an opening (2) which defines a fluidic connection between a fluid channel (3) in the device (1) and surrounding air, a sensor (4) which is coupled to the fluid channel (3) and which is designed to detect at least one component of the surrounding air, and a microfluidic actuator (5) which is connected downstream of the sensor (4) and is designed to suction fluid through the fluid channel (3) during a suction stroke, pump the fluid in the direction of the sensor (4), and pump the suctioned fluid back in the direction of the opening (2) through the fluid channel (3) during a pressure stroke. According to the invention, the sensor (4) is arranged at a distance from the opening (2), and the volume of the fluid channel (3) between the sensor (4) and the opening (2) is precisely as large or small as the stroke volume which the microfluidic actuator (5) can pump in an individual suction stroke