Pipettor including an indicator and method of use

Details Pipettor including an indicator and method of use Pipettor including an indicator and method of use

1997-01-17

2000-09-26

Ludlow, Jan

Chemical apparatus and process disinfecting, deodorizing, preser

Control element responsive to a sensed operating condition

7386402, 7386413, 7386416, 422101, B01L 302

Patent

active

061239054

ABSTRACT:
A pipettor including a body portion, a cylinder having an interior channel, and a filter plug disposed within the channel is disclosed. The filter plug may include a plurality of pores and may preferably be treated with a first chemical, so as to affect closure of the pores when the filter plug contacts a pipetted fluid. The pore closure helps contain leakage of the fluid into the pipettor by sealing the pipettor to additional fluid flow. The filter plug may also be treated with a second chemical to affect a change in the color of the filter plug upon contact with the pipetted fluid. The color change acts as a signal to an operator that possible contamination of the pipettor has occured. The color change and/or closure may also be affected by an aerosol generated from the pipetted fluid.

REFERENCES:
patent: 4999164 (1991-03-01), Puchinger et al.
patent: 5092184 (1992-03-01), Goodell et al.
patent: 5156811 (1992-10-01), White
patent: 5364595 (1994-11-01), Smith
patent: 5456879 (1995-10-01), Suovaniemi
patent: 5496523 (1996-03-01), Gazit et al.

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