METERING DEVICE
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United States of America Patent
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Issued Date -
Aug 23, 2012
app pub date -
Feb 17, 2012
filing date -
Feb 21, 2011
priority date (Note) -
Abandoned
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Abstract
A liquid-based metering device includes:
- at least one dispensing tip,a non-positive displacement and bi-directional pump for dispensing a liquid,a differential pressure flow sensing device including two pressure sensors,a control circuit for driving the pump and the dispensing operation,wherein the pressure sensors of the differential pressure flow sensing device are facing a substrate and are mounted on the substrate, and the substrate includes the electrical connections for the connection of the pressure sensors, the pressure sensors including membranes which are facing the liquid and the control circuit being connected to the pump and to the substrate.
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