| 摘要 |
PROBLEM TO BE SOLVED: To easily mount an ultrasonic oscillator to a measured site even by a person other than a skilled expert, and to provide a desirable ultrasonic propagation characteristic without marring the ultrasonic oscillator. SOLUTION: An ultrasonic oscillator 24 is preliminarily bonded to an outside of a prescribed casing 22, and mounted to fill an opening of the casing 22 with a mounting site in a container 10 of a measured object. After confirming that a drain cock 27 is completely closed, a water feed cock 28 is opened to pour water into inner spaces of a pair of ultrasonic oscillator assemblies 20, 20A. Water is filled at least upto a height level of the ultrasonic oscillator 24 or more. Although water is used here, any of an ultrasonic wave propagating liquid, such as a machine oil, other oil or other liquid, is acceptable for this use instead of water. After finish of the water filling, the water feed cock 28 is closed, and then detection operation is started. |
