| A sort of propellant of projected body, having the characteristics of being virulent, strongly erosive, volatile, combustible, explosive etc., is commonly preserved in hermetic containers. For such case, the lifetime of the level meter is short if an usual contact measuring level meter is used to detect the level in the container. In this paper, a non-contact measuring ultrasonic level meter is presented which is used to measure the container level in the transport or the storage state. |
