Apparatus for measuring radiation transmittance of a process fluid

Apparatus for measuring intensity of UV radiation transmittance through a process fluid comprising a source of radiation, a UV radiation detector adapted to detect radiation emitted from said source of radiation, a canopy positioned to extend over a space formed along a distance separating said radiation detector and said source of radiation, said canopy having an opening for flow of process fluid into and out of said canopy and a measuring fluid supply source connected to said canopy to introduce a measuring fluid interiorly of said canopy and displace at least a portion of said process fluid from said canopy.

An ultraviolet radiation sensitive detector system immersible in fluids comprising a radiation source, an ultraviolet radiation sensitive detector adapted to detect radiation emitted from said radiation source, and an ultraviolet resistant canopy having an upper portion and a lower portion having an opening, said upper portion extending over a distance between said radiation source and a detection portion of the radiation sensitive detector and forming a fluid evacuable space along said distance.

A system for determining the intensity of radiation transmittance of wastewater comprising:

• an ultraviolet radiation source;
• an ultraviolet sensitive photocell, said photocell comprising means for detecting the intensity of ultraviolet radiation transmitted through said wastewater, said photocell having a detector portion positioned at a distance from said radiation source sufficient to detect ultraviolet emitted from said radiation source and travelling through said wastewater;
• an ultraviolet resistant canopy extending over a space extending between said detector portion and said radiation source, said canopy having an opening to permit ingress and egress of wastewater therefrom.