Tecan Trading Ag

Werner Hinn

Lars Kamm

Johann Camenisch

Hans Camenisch

David Kress

Simon Kuenzi

Roman Baumann

The invention relates to a device () having multiple capacitively working channels, wherein the device () comprises a advancable sensor () and a fluid container per channel. The device () also comprises a generator (G) for providing a periodic input signal (s,(t)). In addition, the device () comprises one compensation circuit (CT., CT.) per channel, which can be supplied with the periodic input signal (S(t)) and which is designed to provide an input signal (S(t), S(t)) at a first output (A., A.) for applying to the sensor () of the channel, wherein the compensation circuit (CT., CT.) comprises a further output () which is designed to provide a signal (s(t), s(t)) that can be evaluated to detect a phase boundary.

Method and device for detecting a fluid contacting

The invention relates to apparatuses () for the capacitive determination of the fill level in the individual containers () of a group () of regularly disposed containers of the same dimensions, wherein the apparatus () comprises a transmitter electrode () and a receiver electrode () as well as a circuit for carrying out a capacitive measurement. The measuring circuit comprises a transmitting circuit () and a receiving circuit () and the apparatus () comprises a horizontal base plate () having a plurality of electrodes () which protrude in one direction in relation to a horizontal plane defined by the base plate () and which are uniformly mutually spaced apart such that a plurality of working zones of the same dimensions are formed. A plurality of connections () are provided through which some of the electrodes () are connectable to the transmitting circuit () and controllable by said circuit and some of the electrodes () are connectable to the receiving circuit () and can be read out by said circuit. In the area of each working zone in the horizontal plane at least respectively two electrodes () are opposite one another. By means of the connections () respectively one of these two electrodes () will be used as transmitter and the other of the two electrodes () will be used as receiver.

Capacitive measuring method and apparatus for fill level detection and correspondingly equipped laboratory equipment

The invention relates to a system for measuring a physical variable using a plurality of measuring sensors (). Said system is characterized in that an inverting measuring signal amplifier () is connected downstream of every measuring sensor (), one output of a sensor () each being connected to an inverting input of the measuring signal amplifier () connected downstream of the measuring sensor ().

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Stafa, Switzerland

Werner Hinn