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US 6,183,697 B2Granted
Particle measuring apparatus
AssigneeSysmex Corporation
InventorsYousuke Tanaka, Masakazu Fukuda, Junzo Yamamoto
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Abstract
A particle measuring apparatus surrounds a sample with a sheath liquid to hydrodynamically converge and flow them, and optically measures a particle in the sample to obtain a signal data of the particle. The apparatus provides a monitoring section for comparing a pulse width of the signal data as obtained, with a predetermined standard value to obtain a comparison value and monitoring a flow rate of the sheath liquid based on the comparison value.
Claims12
A particle measuring apparatus comprising:
- a flow section for surrounding a sample with a sheath liquid to hydrodynamically converge and flow the sample and the sheath liquid to provide converged liquid;
- a measurement section including only a single light emitter for measuring a particle in the sample of the converged liquid to provide a signal data of the sample;
- and
- a monitoring section for comparing a pulse width of the signal data with a predetermined value to obtain a comparison value and monitoring a flow rate of the sheath liquid based on the comparison value.
1 more element
Dependencies are inferred from the claim text.