| 摘要 |
<p>A liquid density in a liquid supply tube, through which the liquid is supplied, is stably measured from the outside of the liquid supply tube. A liquid densitometer is provided with a liquid supply tube (14, 16) through which a liquid is supplied, a light transmission unit (15) set at a halfway point of the liquid supply tube (14, 16), a light projection unit (9, 22) that irradiates measurement light to the light transmission unit (15), a light reception unit (10, 23) that receives the measurement light to transmit through the light transmission unit (15), a support member (31) that supports movably the light projection unit (9, 22) and the light reception unit (10, 23) so as to move a measurement position (32) from which the light is irradiated to the light transmission unit (15) and at which the light reception unit (10, 23) receives the light transmitting through the light transmission unit (15), a measurement position moving mechanism (2) that makes the support member (31) move in order for the measurement position (32) to move in a predetermined area of the light transmission unit (15), and a data processing unit that acquires light intensity data which the light reception unit (10, 23) receives at a plurality of measurement positions (32) to calculate a density of the liquid, which flows through the liquid supply tube (14, 16), in accordance with the plurality of the light receiving intensities.</p> |
