Baxter International Inc.

Ic Sensors Inc.

Ronald E Toth

John H Jerman

William Henry Cork, Iii

David A Winchell

David W Pennington

A precise fluid flow meter fabricated by micromachining techniques measures a wide range of fluid flow rates. Two serial portions of an enclosed channel have different cross-sectional areas, and therefore different flow velocities. The fluid carries the thermal pulse through the flow channel to two sensor elements spaced apart along the channel downstream from the heating element. The transit time of the thermal pulse between the two sensor elements measures the fluid flow velocity.

Pulsed thermal flow sensor system

A blood processing assembly includes a centrifuge contained within a heated housing or chamber. A fail safe spill or splash detector is located within the inner wall of the housing. The detector includes a pair of parallel electrodes separated from each other from a small gap. The circuit detects a splash or droplet of liquid which conducts current between the electrodes.

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Grayslake, IL, United States of America

Ronald E Toth