Sensor, especially for oxygen, includes an aperture plate above a luminescent dye indicator on a window above a measuring chamber

摘要

Sensor comprises an opaque housing (10) containing a measuring chamber with an opening (11) to the outside of the housing, a window (20) that closes the opening, a indicator (30) comprising a luminescent dye on the outside of the window, an aperture plate (40) whose inside edge lies on the indicator and whose outside edge extends beyond the window and lies on a surface of the housing. Sensor comprises an opaque housing (10) containing a measuring chamber with an opening (11) to the outside of the housing, a window (20) that closes the opening, a indicator (30) comprising a luminescent dye on the outside of the window, an aperture plate (40) whose inside edge lies on the indicator and whose outside edge extends beyond the window and lies on a surface of the housing. The luminescence of the dye depends on the concentration of an analyte, the dye is illuminated with excitation light from a source within the measuring chamber and the decay in luminescence is determined by a detector within the measuring chamber.