Chemistry: analytical and immunological testing – Automated chemical analysis – With aspirator of claimed structure
Patent
1999-03-22
2000-08-08
Le, Long V.
Chemistry: analytical and immunological testing
Automated chemical analysis
With aspirator of claimed structure
436 49, 436180, 422 67, 422 81, 422100, 422106, 7386302, 7386401, 7386421, G01N 3506, G01F 2328
Patent
active
061000949
ABSTRACT:
In the present invention, a disposable tip or a tip of a cleaning system is attached to a lower edge section of a nozzle, and the nozzle detects a liquid level by receiving fluctuation of a light close to the disposable tip or to an opening section at a lower end of the tip in the cleaning system, for instance, a light reflected from the liquid surface. In the present invention, not only the liquid level is detected, but also a liquid is filled in the disposable tip or the tip of a cleaning system detachably attached to the nozzle, a light is passed through the liquid in the disposable tip or the tip of a cleaning system, and a change of a light amount of the sucked liquid is detected, so that, for instance, a suction rate of the liquid, transparency thereof, contaminated by bubbles therein, clogging and a state wherein water has been exhausted are determined.
REFERENCES:
patent: 4844870 (1989-07-01), Rasmussen et al.
patent: 4939925 (1990-07-01), Sakuma et al.
patent: 4944922 (1990-07-01), Hayashi
patent: 5271902 (1993-12-01), Sakka et al.
Le Long V.
Precision System Science Co., Ltd.
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