OPTICAL RADIATION SENSOR SYSTEM AND METHOD FOR MEASURING RADIATION TRANSMITTANCE OF A FLUID

摘要

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 thicknes s to a second thickness. The sensor element is capable of detecting and responding to incident radiation from radiation source at the first thicknes s and at the second thickness. The optical radiation sensor device allows for determination of radiation (preferably ultraviolet radiation) transmittance of a fluid of interest.