Abstract: A device is described for gravimetric testing of multi-channel pipettes having two or more pipette channels. The device has one receptacle (9) per pipette for a test volume or for a container (2, 20) containing the test volume, and in addition, one weighing cell (1) per receptacle (9) for weighing of the container (2, 20) and/or of the test volume.

Abstract: Control and monitoring devices for influencing safety-relevant system parts in a power station, including at least two rooms being separated from each other, similar electric circuits disposed in each of the rooms for at least one of giving commands and receiving acknowledgements for influencing a system part, a power supply being disposed in each of the rooms and being completely electrically separate from each other, electro-optical converters for transmitting signals being disposed in each of the rooms, and optical waveguide cables connecting the converters to each other.

Abstract: The invention relates to a zinc dust primer system which renders possible a mass production working of metal sheets by noncutting processes. The said primer system consists of a lower or bottom layer containing the actual zinc dust primer, and a covering layer containing a substance promoting sliding and a binder. A suitable substance promoting sliding is, in particular, graphite. The system of the invention is especially applicable in the automobile, shipbuilding and packing industries and in the construction of steel furniture. It is of special interest in the case of the coil-coating process.