| 摘要 |
A level sensing device for measuring the level of an electrically conducting liquid comprises a stationary electrode (17) and a movable electrode (20) suitably comprising a bob attached to a wire. The movable electrode is raised or lowered within a liquid container by a stepping motor (24). Upon contacting the liquid a closed circuit is established between stationary electrode (17) and movable electrode (20) which is detected by a microprocessor (28). Microprocessor computes the position of the movable electrode (20) within the container and determines the level and/or volume of liquid in the container. The device can provide accurate measurements of liquid levels, volumes or changes in volume in a liquid container. |
