Personal sampling pump

Details Personal sampling pump Personal sampling pump

G - Physics

05

D

341/38

G05D 7/06 (2006.01) F04B 49/06 (2006.01) F04B 49/20 (2006.01)

Patent

CA 1150802

PERSONAL SAMPLING PUMP Abstract A portable battery powered pump providing constant mass flow of air sample through a particular filter or vapor trap in which the pump drive motor speed is controlled by an amplifier having a reference voltage input and an inverse feedback signal related to sensed motor speed. Compensation for increased resis- tance to air sample flow is made by a motor current feedback signal applied to the amplifier to cause motor speed to increase with increased flow resistance.

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