Perfusion rate control and safety device - has photoelectric cells slidable on vertical tube parallel to vessel

Abstract

Abstract Variation of liq. level in the vessel is automatically controlled and data provided whatever the nature or opacity of the liq. such as blood. Photoelectric cells are positioned on a vertical transparent tube, parallel to the connection between vessel base and tube, a common level being established in both. The cells can be arranged to slide along a graduated scale on the tube, the upper one being above the level, while the lower one is at the appropriate level below it to trigger the level control.

Inventors

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