Sensor cap for optochemical sensor

A sensor cap for an optochemical sensor, comprising:

• a substantially cylindrical plug-in component having an optical component having a surface region shaped for optimal flow, the optical component disposed in an end region of the plug-in component facing a medium, the optical component having a matrix on the surface region, the matrix having an analyte-sensitive functional layer;
• and
• a sleeve-shaped outer component,
• wherein near the surface region, the optical component is embodied at least partially of a material transparent to measuring radiation,
• wherein the plug-in component and the outer component are configured such that a connecting region coming into contact with the medium is formed between the plug-in component and the outer component in an edge region of the surface region or is formed at a radial distance from the edge region of the surface region and is sealed without a gap facing the medium,
• the optical component further having a membrane disposed on the surface region, the membrane including the matrix disposed on or in a substrate layer, through which an analyte can diffuse or which blocks an analyte,
• wherein the plug-in component is configured as a single part and the matrix or the membrane is flexible and serves as a means of gap-free sealing between the plug-in component and the outer component, and
• the plug-in component further having an outer ring having an inner contour and an inner ring having an outer contour corresponding to the inner contour, the outer ring and the inner ring disposed in at least a portion of the axial region where the plug-in component and outer component overlap, wherein in the edge region of the surface region the optical component is connected to the inner ring.

An optochemical sensor for determining or monitoring at least one analyte present in a medium, comprising:

• a sensor cap comprising:
• a substantially cylindrical plug-in component integral with an optical component having a surface region shaped for optimal flow, the optical component disposed in an end region of the plug-in component facing a medium, the optical component having a matrix on the surface region, the matrix having an analyte-sensitive functional layer;
• and
• a sleeve-shaped outer component, wherein near the surface region, the optical component is embodied at least partially of a material transparent to measuring radiation, and wherein the plug-in component and the outer component are configured such that a connecting region coming into contact with the medium is between the plug-in component and the outer component in an edge region of the surface region and is sealed without a gap facing the medium;
• an electronic component having a light source, a detection unit, and a control/evaluation unit;
• and
• wherein the plug-in component or the optical component includes an annular recess for receiving a sealing ring in the edge region of the surface region, and the recess and the sealing ring are configured such that the connecting region is sealed gap-free against the medium.