Abstract: A sensor is provided for controlling functioning, e.g. for controlling drop delivery of a micropipette of a nanoplotter or the like and/or for determining the exact local drop deposition and/or its positional deviation from the envisaged deposition site and/or measuring the size of a drop. The invention aims at providing a sensor that makes it possible to detect delivery of a drop. According to the invention, this is done by using a point, line or planar shaped electrode (1) on at least one measuring field (3, 3′) that is connected to at least one electronic evaluation device (7) and on which at least one test drop (4) is deposited or dropped with the aid of the micropipette.

Abstract: A microejector pump for generating microdrops includes at least one pump chamber configured in a silicon chip and a piezoelectrically actuable silicon membrane arranged over the pump chamber. The pump chamber is connected to at least one supply line as well as a discharge line provided with an ejection orifice. A glass chip closes off at least the pump chamber from the silicon membrane. The microejector pump can also include an integral heater and controller.