Method and apparatus for aspirating and dispensing sample fluids
First Claim
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1. An apparatus for aspirating and dispensing a sample fluid comprises:
- a constant air source having an output port;
a pump valve having a first port coupled to the output port of said constant air source, a sample probe port and a vent port;
a connecting member having a first port coupled to the sample probe port of said pump valve, a second port and a third port;
a diluter having an output port coupled to the second port of said connecting member;
a flow through pressure transducer having a first port coupled to the third port of said connecting member, a second port to provide a first pressure signal and a third port;
a sample probe having a first port coupled to the third port of said flow through pressure transducer;
a detector having a first port coupled to said second port of said transducer, said detector providing a second pressure signal; and
a controller for said air source, pump valve, diluter and sample probe operating as a function of said second pressure signal.
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Abstract
A method and apparatus for aspirating and dispensing a sample fluid. The apparatus includes an air source having an output port coupled to a first port of a flow through pressure transducer. A second port of the flow through pressure transducer is coupled to a first port of a sample probe. The flow through pressure transducer provides transducer signals to a detector circuit. In response to the transducer signals provided thereto, the detector detects the occurrence or non-occurrence of a plurality of different events.
123 Citations
13 Claims
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1. An apparatus for aspirating and dispensing a sample fluid comprises:
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a constant air source having an output port; a pump valve having a first port coupled to the output port of said constant air source, a sample probe port and a vent port; a connecting member having a first port coupled to the sample probe port of said pump valve, a second port and a third port; a diluter having an output port coupled to the second port of said connecting member; a flow through pressure transducer having a first port coupled to the third port of said connecting member, a second port to provide a first pressure signal and a third port; a sample probe having a first port coupled to the third port of said flow through pressure transducer;
a detector having a first port coupled to said second port of said transducer, said detector providing a second pressure signal; anda controller for said air source, pump valve, diluter and sample probe operating as a function of said second pressure signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for aspirating and dispensing a sample fluid comprising:
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a constant air source having an output port; a bleed valve having a first port coupled to the output port of said constant air source and a second port; a pump valve having a first port coupled to the second port of said bleed valve, a sample probe port and a vent port; a connecting member having a first port coupled to the sample probe port of said pump valve, a second port and a third port; a diluter having an output port coupled to the second port of said connecting member; a flow through pressure transducer having a first port coupled to the third port of said connecting member a second port to provide a pressure signal, and a third port; a sample probe having a first port coupled to the third port of said flow through pressure transducer; and a controller for said air source, bleed valve, pump valve, diluter and probe operating as a function of said pressure signal. - View Dependent Claims (11, 12, 13)
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Specification