GRAIN ANALYZER

• Main Authors: YUGUCHI NAOKI, TAGO AKIRA
• Format: Patent
• Language: English
• Published: 12.09.1987
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

PURPOSE:To always keep a sample liquid diameter constant by selecting a sectional area ratio of a sheath liquid container and a sample liquid container, so as to become equal to a flow rate ratio of a sheath liquid and a sample liquid which are flowing in a flow cell. CONSTITUTION:An air the tube 2 which is connected to a compressor 1 is connected to a sample liquid container 4 and a sheath liquid container 6 through a sample pressure control valve 3 and a sheath pressure control valve 5. A sample tube 7 is led into a nozzle 9 and its tip part is directed into a flow cell 10, and a sheath tube 11 is connected to the inside of the nozzle 9. In such a case, when a sectional area ratio of the sample liquid container 4 and the sheath liquid container 6 is selected, so as to become equal to a flow rate ratio of a sample liquid Sa and a sheath liquid Se which are flowing in the flow cell 10, even if a sample liquid surface H1 and a sheath liquid surface H2 are decreased in the course of a measurement, a measurement under a constant pressure can be executed without being influenced by pressure thereby.