Method and device for fluid sampling
First Claim
1. A fluid stream sampler for variable flow rate controlled air sampling, the sampler comprising:
- (a) a housing body having a vacuum outlet opening formed therein, a sampling port inlet formed therein, and a flowpath extending between the outlet opening and the inlet;
(b) a volumetric flow rate indicator disposed in the flowpath between the vacuum outlet opening and the sampling port inlet;
(c) a hose, fluidly connected at one end to a vacuum source, has a fitting at the other end thereof that is insertable into the vacuum outlet opening;
(d) an adjustable damper panel interposed in the flowpath regulates the vacuum pressure within the housing body;
whereby a vacuum imparted by the vacuum source directs a fluid stream through the housing body along the flowpath between the vacuum outlet opening and the sampling port inlet such that, upon moving the damper panel to a desired position within the flowpath, a desired volumetric flow rate is achieved as measured by the indicator, the desired volumetric flow rate corresponding to a preferred flow rate specified for a fluid constituent sampling medium interposed in the flowpath at the sampling port inlet.
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Accused Products
Abstract
A fluid stream sampler enables variable flow rate controlled air sampling, as an attachment to a vacuum source, typically a household vacuum cleaner. The fluid stream sampler includes a housing body having a vacuum outlet opening and a sampling port inlet. A volumetric flow rate indicator is disposed in the flowpath between the vacuum outlet opening and the sampling port inlet. An adjustable damper panel interposed in the flowpath regulates the vacuum pressure within the housing body. In operation, a vacuum imparted by the vacuum source directs a fluid stream along the flowpath between the vacuum outlet opening and the sampling port inlet such that, upon moving the damper panel to a desired position within the flowpath, a desired volumetric flow rate is achieved as measured by the indicator. The desired volumetric flow rate corresponds to a preferred flow rate specified for a fluid constituent sampling medium interposed in the flowpath at the sampling port inlet. A fluid stream sampler enables gas bag sampling, as an attachment to a vacuum chamber, typically a paper shipping tube. The vacuum chamber includes a vacuum outlet opening and an inlet. A gas bag is disposed in the chamber. A self-sealing valve is disposed in the bag and a straw is disposed in the valve. The straw having an inlet exterior to the vacuum chamber and an outlet interior to the gas bag. Whereby a vacuum imparted by the fluid stream sampler at the outlet port directs a pressure drop interior to the vacuum chamber and a pressure differential effect on the gas bag, such that, a fluid stream is developed through the straw and collected in the gas bag.
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Citations
9 Claims
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1. A fluid stream sampler for variable flow rate controlled air sampling, the sampler comprising:
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(a) a housing body having a vacuum outlet opening formed therein, a sampling port inlet formed therein, and a flowpath extending between the outlet opening and the inlet; (b) a volumetric flow rate indicator disposed in the flowpath between the vacuum outlet opening and the sampling port inlet; (c) a hose, fluidly connected at one end to a vacuum source, has a fitting at the other end thereof that is insertable into the vacuum outlet opening; (d) an adjustable damper panel interposed in the flowpath regulates the vacuum pressure within the housing body; whereby a vacuum imparted by the vacuum source directs a fluid stream through the housing body along the flowpath between the vacuum outlet opening and the sampling port inlet such that, upon moving the damper panel to a desired position within the flowpath, a desired volumetric flow rate is achieved as measured by the indicator, the desired volumetric flow rate corresponding to a preferred flow rate specified for a fluid constituent sampling medium interposed in the flowpath at the sampling port inlet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification