Patent ID: 8902427
Filing Date: 2014-12-02
Classification: G01N

Abstract:
1. A photometer ( 10 ) for measuring photometric magnitudes in a liquid medium, comprising a housing ( 100 ) adapted to be introduced into the medium for on-site measurement; a light-emitting measuring beam transmitter ( 30 ) and a measuring beam receiver ( 31 ) arranged behind opposing measuring windows ( 6 ) on a measuring slot in the housing ( 100 ), in which the slot is open to the medium, wherein a measuring beam ( 11 ) is generated in a measuring conduit ( 1 ) disposed in the measuring slot ( 7 ) with at least one predetermined wavelength for measuring light absorption in the medium; a reference conduit ( 51 ) for a reference measurement, which is separate from the measuring conduit ( 1 ), disposed in the housing ( 100 ); at least one carrier part ( 90 , 21 , 22 ) including the measuring beam transmitter ( 30 ), the measuring beam receiver ( 31 ) and their optical structural components, in which the one carrier part is configured to move on a path (B) in the housing ( 100 ) from the measuring conduit ( 1 ) to the reference conduit ( 51 ) and back, for measuring intensity values of the measuring beam ( 11 ) in the measuring conduit ( 1 ) and in the reference conduit ( 51 ); and means for detecting and evaluating the measured intensity values; wherein the measuring conduit is completely immersed within the liquid medium upon the liquid medium entering the measuring slot; and the measuring beam is generated toward both, the measuring conduit and the measuring slot.