| 摘要 |
PROBLEM TO BE SOLVED: To provide a cost-reducible and miniaturizable measuring cell for a particle size sensor capable of preventing efficiently a powder sample or the like from adhering to optical windows. SOLUTION: This measuring cell for the particle size sensor for measuring the particle size of the sample by irradiating a scattering field 40 inside the measuring cell 4 with measuring light from a light source has a jet nozzle 41 arranged on the position not interfering with the measuring light irradiated from the light source and scattered light diffracted or scattered on the scattering field, for introducing the powder sample into the scattering field, the optical windows 43, 44 for allowing the measuring light to enter the scattering field and emitting the measuring light from the scattering field to the outside of the measuring cell, exhaust nozzles 472, 482 arranged dispersedly on the outer peripheral parts of the inner faces of the optical windows, for jetting pressurized fluid to the inner faces of the optical windows, fluid passages 473, 483 for flowing the pressurized fluid jetted from the exhaust nozzles from the optical windows toward the scattering field, and a discharge nozzle 42 for discharging the powder sample measured in the scattering field. COPYRIGHT: (C)2004,JPO
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