Visibility sensor system
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United States of America Patent
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-
Dec 11, 2001
Grant Date -
N/A
app pub date -
Nov 19, 1998
filing date -
Nov 19, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A visibility sensor system includes a housing having a sensor head opening. A removable sensor head assembly is removably coupled to the housing within the sensor head opening. The sensor head assembly has a sensor enclosure and a connector. An electronics module is coupled to the sensor head through the connector. A rain sensor determines the presence of rain and causes shutters to cover openings in the sensor exclosure. In other embodiments, the sensor enclosure is configured to develop a pressure differential internally to minimize contamination of light source and light detector.
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