| 摘要 |
An apparatus for continuously aspirating a fluid from a fluid source. A vacuum source is operatively connected to a first container forming a first chamber and a second container forming a second chamber. A fluid collection tube provides communication between the fluid source and each of the first chamber and the second chamber. A first level sensor is positioned within the first chamber and a second level sensor is positioned within the second chamber. Upon receiving a signal generated by one of the first level sensor and the second level sensor, a relay responsively exposes a vacuum within one of the first chamber and the second chamber to continuously aspirate at least a portion of the fluid from the fluid source. A shut-off valve is preferably positioned within each of the first chamber and the second chamber to prevent communication between the vacuum source and the corresponding chamber with a fluid level within the chamber at a fluid level setpoint.
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