Wettable devices operational with aqueous liquids

Details Wettable devices operational with aqueous liquids Wettable devices operational with aqueous liquids

B - Operations, Transporting

01

F

73/58, 165/71, 3

B01F 3/04 (2006.01) G01F 23/292 (2006.01)

Patent

CA 1252541

WETTABLE DEVICES OPERATIONAL WITH AQUEOUS LIQUIDS Abstract A humidifier (10) used in respiratory therapy is disclosed where the surface tension of a light probe (32) used therewith is maintained greater than the surface tension of the aqueous liquid used in the humidifier (10). Maintaining the surface tension of the light probe (32) greater than the surface tension of the aqueous liquid generally avoids erroneous indication of aqueous liquid level in the humidifier (10), Erroneous indica- tions of liquid level can be caused by gas bubbles adhering to submerged portions of the light probe (32) or liquid droplets adhering to unsubmerged portions of the light probe (32). Sur- face tension of the light probe (32) can be maintained greater than surface tension of the aqueous liquid by coating the light probe (32) with a surface active agent, by subjecting the light probe (32) to corona discharge or plasma treatment, by coating the interior surface of the humidifier cannister (14) with an amount of surface active agent, by adding an amount of surface active agent to the aqueous liquid in the humidifier (10) or by any combination.

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