| 摘要 |
PROBLEM TO BE SOLVED: To provide a densitometer used in a supply system for organic raw material fluid or the like capable of simplifying the structure, downsizing, reducing manufacturing cost, stably measuring density with transparency of a light transmissive window being kept constant, and improving air tightness performance and particle resistance.SOLUTION: A photoanalytic raw material flow rate density detector is composed of: a main body 2 of the detector; a light transmission part 5a provided on a top surface of the main body of the detector; and a light detection part 5b provided on an undersurface of the main body of the detector. The photoanalytic raw material flow rate density detector includes: recesses 17 provided on the top surface and the undersurface of the main body 2 of the detector, and made to communicate with each other by a fluid path 2b; a gasket type seal 6 mounted in the recess 17; a first fixing flange 14 and a second fixing flange 16 disposed so as to face the gasket type seal 6, sandwiching a light transmissive plate 11a made of sapphire, and fitted and fixed to each other airtightly; optical fiber 9 and a photodiode 10 provided in the second fixing flange 16; and a holding and fixing body 12 for airtightly fixing both fixing flanges 14, 16 fitted and fixed to each other, in the recess 17 of the main body 2 of the detector, via the gasket type seal 6. |
