Useful life indicators

An air treatment control device has a useful life indicator of an air treatment chemical dispenser. The indicator device has a well with a volatile indicator material positioned therein. The well's cavity is configured to achieve clumping of the remaining indicator material as some volatizes du...

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Bibliographic Details
Main Authors DAVIS, BRIAN T, DEGRAFT-JOHNSON, KWAMEMA GYAKYE, VARANASI, PADMA P, ADAIR, JOEL E, MAGHASI, ANNE T, SCHUMACHER, DONALD J
Format Patent
LanguageEnglish
French
German
Published 30.06.2010
Subjects
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Summary:An air treatment control device has a useful life indicator of an air treatment chemical dispenser. The indicator device has a well with a volatile indicator material positioned therein. The well's cavity is configured to achieve clumping of the remaining indicator material as some volatizes due to capillary attraction. This presents a shrinking display that can be coordinated with the level of use of the air treatment chemical dispenser.
Bibliography:Application Number: EP20100156896