| 摘要 |
A device for providing one or more signals that are functions of a sensor module's altitude relative to a reference body of a liquid. The sensor module has one or two hydrostatic pressure transducers (10) which transducers are linked to the bodies of liquid (2) by respective liquid-filled elongated flexible conduits (8). The first two embodiments have only single transducers (10) each connected by a single conduit to a single body of liquid (2). In each case, the body of liquid (2) is under ambient atmospheric pressure plus added pressure to maintain a positive pressure with respect to ambient pressure. In a third embodiment, a differential transducer (10) has one port linked to the body of liquid (20) and a second port linked to a pressurized gas (26) which also applies pressure to the body of liquid.
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