Optical radiation sensor system and method for measuring radiation transmittance of a fluid

Abstract

An optical radiation sensor device for detecting radiation in a radiation field having a thickness. A preferred embodiment of the device includes a radiation source and a radiation sensor element positioned to receive radiation from the radiation source. A motor (or other motive means) is provided to alter the thickness of the radiation field from a first thickness to a second thickness. The sensor element is capable of detecting and responding to incident radiation from radiation source at the first thickness and at the second thickness. The optical radiation sensor device allows for determination of radiation (preferably ultraviolet radiation) transmittance of a fluid of interest.

1 . An optical radiation sensor device for detecting radiation in a radiation field, the device comprising: 
 a stationary radiation source; a stationary radiation sensor element positioned to receive radiation from the radiation source;    a boundary element disposed between the radiation source and the radiation sensor element to define a thickness corresponding to the distance between the boundary element and the radiation source; and    motive means to alter the relative distance between the boundary element and the radiation source to thereby alter the thickness of the radiation field from a first thickness to a second thickness;    the sensor element capable of detecting and responding to incident radiation from radiation source at the first thickness and at the second thickness.    
   
   
       2 - 39 . (canceled)