| 摘要 |
PURPOSE: An air bubble sensor is provided to safely sense air bubbles inside a tube using infrared rays. CONSTITUTION: An air bubble sensor comprises an infrared ray emitting unit(2) and an infrared ray receiving unit(3). The infrared ray emitting unit radiates infrared rays. The infrared ray receiving unit senses the infrared rays emitted by the infrared ray emitting unit. The existence or the size of air bubbles(17) inside a tube(6) is sensed. A fluid, which exists in a region where the infrared rays are radiated between the infrared emitting and receiving units, flows in the tube. [Reference numerals] (1) Infrared air detection sensor; |
