| 摘要 |
A fluid monitoring apparatus for detecting which of a first fluid, a second fluid and a third fluid is present, the second fluid having a density less than the first fluid and the third fluid having a density less than the second fluid, the apparatus comprising: a first float having a density less than that of the first fluid but greater than that of the second fluid; a second float having a density less than that of the second fluid but greater than that of the third fluid; and a sensor, the sensor being configured to detect the first float and the second float so that the position of the floats can be determined. |
