| 摘要 |
<p>Apparatus to measure the level (12) of liquid in a container (10) using a coiled tube (14) open at the end (16) situated at the base (18) of the container. An acoustic signal or electromagnetic signal is transmitted down tube (14) from transmitter/receiver (26). By determining the point at which reflection occurs using the time delay for an echo or resonance within lengths (20, 22) of tube (14), the level (12) is measured. By shaping the coil to the container a linear measure can be achieved even for an irregularly shaped container. It can also measure the level of unmixed or immiscible gases.</p> |
