| 摘要 |
PROBLEM TO BE SOLVED: To provide a microwave densitometer capable of being attached even to a measuring pipe, having a caliber smaller than those of conventional types by miniaturizing the shape of a microwave transmission antenna and that of a microwave receiving antenna and made hard to deposit a suspended substance. SOLUTION: The microwave densitometer is constituted so as to calculate the concentration of a fluid to be measured from the change in the microwave propagation time. Each of a microwave transmission antenna 1a and a microwave receiving antenna 1b is equipped with a coaxial core conductor 11, the cylindrical insulating body 12 for covering the periphery of the coaxial core conductor 11 and the metal cylinder 14 for opening at part of the outer periphery opposed to the insulating body 12 and both of the microwave transmission antenna 1a and the microwave receiving antenna 1b have their respective coaxial core conductors 11 provided in a facing relation on the plane crossing or parallel to a pipe axis. COPYRIGHT: (C)2008,JPO&INPIT |
