Method of detecting dispensed quantity, and liquid suction monitoring dispensing apparatus
US8307722B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2006 |
| Grant date | Nov 13, 2012 |
| Priority date | — |
| Expiry date | Sep 15, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2035/1025
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There are provided a method of detecting dispensed quantity in which without the need of detecting a surface of liquid accommodated in a container, a liquid quantity can be detected only by measuring pressure change; and a relevant liquid suction monitoring dispensing apparatus. There is provided a method of detecting dispensed quantity for detection of the quantity of liquid suctioned and discharged by a dispensing apparatus including a pipette tip, a liquid suctioning/discharging mechanism for the pipette tip, a pressure sensor capable of detecting the pressure within the pipette tip, and a lifting and lowering mechanism for the pipette tip, which method comprises: an insertion step for inserting a distal end of the pipette tip down to the deepest zone of a container accommodating liquid to be measured; a suction pressure measuring step for without moving of the pipette tip, while suctioning the liquid into the pipette tip at a predetermined suctioning rate, measuring any pressure change during the suctioning; and a suction detecting step for on the basis of pressure change measured, determining the state of suction. Further, there is provided a liquid suction monitoring dispensi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.