Presens Precision Sensing Gmbh

Robert J Meier

Achim Stangelmayer

Gregor Liebsch

Daniela Obermaier

Gernot Thomas John

A method and an arrangement, for detecting microorganisms on a surface are disclosed. At least a portion of the surface is covered with a sensor foil in an airtight manner. An oxygen-permeable layer of the sensor foil is doped with an oxygen indicator dye, loaded with oxygen and faces the at least one portion of the surface. An excitation light passes through an oxygen-impermeable at least partially transparent read-out carrier layer of the foil to the dye in the oxygen-permeable layer which is then excited by the excitation light. An emission of the oxygen indicator dye) transmitted through the carrier layer is detected by a detection element over or after a period of time (t). The emission of the oxygen indicator dye from the oxygen-permeable layer is indicative of the amount of oxygen consumed by microorganisms from the oxygen-permeable layer covering the at least one portion of the surface.

Method, arrangement, computer program product and sensor foil for detecting microorganisms on a surface

A system for analysis of a fluid sample has a carrier with a channel. A plug with a sensor can be inserted into a socket arranged on the carrier in such a way that the sensor is in contact with an interior volume of the channel. The sensor can be an optical sensor, in particular based on fluorescence. Optical fibres may be connected to the plug. A camera () may be provided to record an image of the plug. The carrier may in particular be a microfluidic chip and the channel a microfluidic channel.

System for analysis of a fluid sample

In a sensor device, a plurality of light guides having a respective first end and a respective second end are arranged on a common carrier, with the first end of each light guide of the plurality of light guides at a respective defined position on the carrier. At each of the second ends of the light guides there is provided at least one sensor element which exhibits an optical behavior dependent on an analyte. The second ends are at defined perpendicular distances to the carrier. At least two of the second ends differ with respect to the defined perpendicular distances.

Sensor device and measuring method comprising plural light guides with each second end disposed at a defined perpendicular distance to the first end on a carrier

A method and measurement system for calibrated measurement of at least one variable of a sample are based on an optical behaviour of at least one sensor substance which depends on the at least one variable. The at least one sensor substance is brought into contact with the sample. At least one calibration area, associated with the at least one sensor substance, is defined. At least one image is recorded which captures at least one of the at least one sensor substance and at least one of the at least one calibration area. The value of the at least one variable of the sample is derived from the at least one image, based on image data associated with the at least one of the at least one sensor substance and on image data associated with the at least one of the at least one calibration area.

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Nittendorf, Germany

Robert J Meier