OPTICAL CONCENTRATION SENSOR

PROBLEM TO BE SOLVED: To provide an improved optical concentration sensor for use with a continuous ink jet printer. SOLUTION: The optical concentration sensor comprises an optical cell which can contain a fluid 30 to be tested, at least one light source 22 for passing light through the fluid, at le...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ROBERTS JEFFREY L, LOYD JOHN C, LARGE TIMOTHY, MARK C BOWERS, SINCLAIR GARY, MULLINS RANDAL L, KING TOBY
Format:	Patent
Sprache:	eng
Schlagworte:	CORRECTION OF TYPOGRAPHICAL ERRORS i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LINING MACHINES MEASURING PERFORMING OPERATIONS PHYSICS PRINTING SELECTIVE PRINTING MECHANISMS STAMPS TESTING TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an improved optical concentration sensor for use with a continuous ink jet printer. SOLUTION: The optical concentration sensor comprises an optical cell which can contain a fluid 30 to be tested, at least one light source 22 for passing light through the fluid, at least one light detector 26 for detecting light transmitted through the fluid, and electronic circuit for monitoring a first output from the light detector and providing a second output related to concentration of the fluid. Specifically, the improvement has a curved inner surfaces of the optical cell walls for producing at least one region with a narrow gap for transmission of light through the fluid and regions with wider gaps for more efficient flow of fluid through the cell.