Probe and syringe drive apparatus

Details Probe and syringe drive apparatus Probe and syringe drive apparatus

B - Operations, Transporting

01

L

73/103, 222/2

B01L 3/02 (2006.01) G01N 35/10 (2006.01)

Patent

CA 1107251

A B S T R A C T Automatic dispensing apparatus such as used in a chemical analysis system for transferring liquids from sample containers to analysis containers, including a pipet probe assembly with an elongated probe, probe drive means for inserting the probe into the sample and moving the probe assembly between the sample container and analysis container, means for aspirating and dispensing a portion of the sample from the probe into a respective analysis container, an elongated level sensing probe extending downwardly from the probe assembly, with the difference in distance between the tip of the level sensing probe and the tip of the pipet probe defining the amount of penetration of the pipet probe tip below the sample level, and control means, including means responding to the tip of the level sensing probe con- tacting said sample level to stop the probe drive means thereby minimizing the penetration of the pipet probe tip below the sample level.

337555

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