Patent ID: 8997552
Filing Date: 2015-04-07
Classification: B01L,G01M

Abstract:
1. A method for testing for leaks in a hand-held, single-channel or multichannel piston stroke pipette, said method comprising the steps of: a) fitting a pipette tip onto a pipette; b) connecting a free end of the pipette tip on the pipette to a leak testing apparatus, said leak testing apparatus being located externally of the pipette and the leak testing apparatus including a vacuum pump, a pressure sensor, a display apparatus, and a connection volume; c) evacuating by the vacuum pump the pipette, the pipette tip, and the connection volume in the leak testing apparatus to a measurement pressure below atmospheric pressure; d) stopping or disconnecting the vacuum pump, and sealing the connection volume, and with the connection volume sealed, using the pressure sensor to measure the pressure in the connection volume at least one of during and after a defined time interval with any pressure rise that has occurred being determined; and e) depending on said determined pressure rise, evaluating the pipette as to whether the pipette is sufficiently tight/usable or insufficiently tight/unusable.