Radiation sensor
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United States of America Patent
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-
May 3, 1988
Grant Date -
N/A
app pub date -
Apr 18, 1986
filing date -
Apr 24, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to measuring the ultra-violet radiation received from tubular ultra-violet source mounted within a quartz sleeve, the radiation passing through water within a tubular circuit coaxial with the source and sleeve. A sensor probe fits within a socket formed in the wall of the conduit. The probe comprises a plane quartz window at one end and an ultra-violet sensor tube at the other end. Radiation from the window passes through an iris, whose size and position are chosen so that the source projects an image through the iris which is at least twice the size of the sensitive area on the sensor. In order to minimize inconsistencies due to faulty positioning of the sensor tube, the axis of the tube is preferably at right angles to the axis of the source. The output of the sensor is connected with a logic circuit which has means for providing a multi-state indication of radiation within the conduit.
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