Measuring and testing – Sampler – sample handling – etc. – Capture device
Patent
1995-01-31
1996-09-10
Noland, Thomas P.
Measuring and testing
Sampler, sample handling, etc.
Capture device
7386332, 422 8209, G01N 2175, G01N 3510
Patent
active
055548113
ABSTRACT:
A sampling system, favorably applicable to an automatic chemical analyzer, is provided for sampling by sucking and discharging liquid, such as specimens and reagents. The sampling system comprises a pump having a container in which an inner space of a certain volume is formed and an actuator arranged in the inner space to fore a pumping chamber therein. The actuator comprises a base plate having both sides thereon and a piezoelectric element attached to the base plate. Further provided are a tube having one end connected to the pumping cheer, a nozzle connected to another end of the tube, and an element for controlling a driving voltage applied to the piezoelectric element. For instance, the piezoelectric element is composed of two piezoelectric plates attached each to both the sides of the base plate. A piezoelectric sensor is attached to the base plate for detecting distortion of the actuator, a liquid level of specimens and reagents, and error operations such as air suction and jamming. The piezoelectric sensor is attached to a cutout portion, partly cut out in either one of two piezoelectric plates. In case of being applied to the automatic chemical analyzer, an output signal from the piezoelectric sensor is used for correction of absorbance data.
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Inoue Morito
Matsumoto Kouji
Rokugawa Kyuji
Kabushiki Kaisha Toshiba
Noland Thomas P.
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