| 摘要 |
<p>This invention relates to a compact density measuring instrument using for measuring density of fluids in a volume, especially in a fluid flow in a pipe, the instrument comprising a radiation source in the gamma range positioned on one side of the fluid and a detector positioned on the opposite side of the fluid for receiving said radiation, and the fluid being contained in a pipe or similar container, wherein the source is positioned in a source housing, said source housing being at least partially fitted into a corresponding recess in the container wall. The beam axis between the source and the detector has an angle relative to the pipe axis being less than 90 degrees.</p> |
