| 摘要 |
A method and apparatus for visually detecting when a luminescent dissolved oxygen sensor is operating is disclosed. In one example embodiment of the invention, a shutter is placed into the light tight container. When the shutter is open, a user can see into the light tight container and verify probe operation. When the shutter is closed, external light is prevented from entering the light tight container and affecting measurement accuracy. In another example embodiment of the invention, one end of a light pipe is placed on the outside of the light tight container, and the other end is positioned to view the light source of the probe. In another example embodiment of the invention a second light source, visible on the outside of the light tight container, is used to verify operation of the probe. In another example embodiment of the invention, a predetermined area is left open in the optically opaque hydrostatically transparent on the face of the sensor window, allowing a user to see light from the sensor when the sensor is operating properly.
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