| 摘要 |
<p>A level meter (10) includes a microwave transmitter (11), a microwave receiver (12) and a guide member (15) which is equipped with a port (23) for introducing a sample to be detected or with a guide body (219) made of a dielectric. The guide member is attached to a container (1) and connected at one end to the microwave transmitter (11) and at the other end to the microwave receiver (12) in such a manner that it extends into the container. The guide member serves to conduct a microwave (M) from the microwave transmitter (11) to the microwave receiver (12). When a sample enters the guide member (15) through the port (23) of the guide member (15), the propagation of the microwave (M) is interrupted. The microwave receiver (12) detects this interruption and indicates that the sample has reached a predetermined level. Alternatively, when the sample comes into contact with the guide body (219), the propagation quantity of the microwave (M) propagating through the guide body (219) changes. The storage level of the sample is detected by detecting this change quantity.</p> |
