Isokinetic air sampler

Sehmel, George A

Title: Isokinetic air sampler

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Abstract

An isokinetic air sampler includes a filter, a holder for the filter, an air pump for drawing air through the filter at a fixed, predetermined rate, an inlet assembly for the sampler having an inlet opening therein of a size such that isokinetic air sampling is obtained at a particular wind speed, a closure for the inlet opening and means for simultaneously opening the closure and turning on the air pump when the wind speed is such that isokinetic air sampling is obtained. A system incorporating a plurality of such samplers provided with air pumps set to draw air through the filter at the same fixed, predetermined rate and having different inlet opening sizes for use at different wind speeds is included within the ambit of the present invention as is a method of sampling air to measure airborne concentrations of particulate pollutants as a function of wind speed.

Inventors:

Sehmel, George A ^[1]

Richland, WA

Issue Date:: 1979-01-01

Research Org.:: Battelle Memorial Institute, Columbus, OH (United States)

OSTI Identifier:: 863380

Patent Number(s):: 4159635

Assignee:: United States of America as represented by United States (Washington, DC)

Patent Classifications (CPCs):: G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

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G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N1/24 - Suction devices {
G01N1/2202 - {involving separation of sample components during sampling}
G01N1/2247 - {Sampling from a flowing stream of gas}
G01N2001/2223 - {aerosol sampling devices}
G01N2001/225 - {isokinetic, same flow rate for sample and bulk gas}

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DOE Contract Number:: AC06-76RL01830

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: isokinetic; air; sampler; filter; holder; pump; drawing; fixed; predetermined; rate; inlet; assembly; therein; size; sampling; obtained; particular; wind; speed; closure; means; simultaneously; incorporating; plurality; samplers; provided; pumps; set; draw; sizes; speeds; included; ambit; method; measure; airborne; concentrations; particulate; pollutants; function; air sampling; air pump; air sampler; air sample; predetermined rate; wind speed; drawing air; isokinetic air; sampling air; draw air; /73/

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                    Sehmel, George A. Isokinetic air sampler.  United States: N. p., 1979. 
        Web.

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                    Sehmel, George A. Isokinetic air sampler.  United States.

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                    Sehmel, George A. Mon .  
        "Isokinetic air sampler".  United States.  https://www.osti.gov/servlets/purl/863380.

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@article{osti_863380,

  title        = {Isokinetic air sampler},

  author       = {Sehmel, George A},

  abstractNote = {An isokinetic air sampler includes a filter, a holder for the filter, an air pump for drawing air through the filter at a fixed, predetermined rate, an inlet assembly for the sampler having an inlet opening therein of a size such that isokinetic air sampling is obtained at a particular wind speed, a closure for the inlet opening and means for simultaneously opening the closure and turning on the air pump when the wind speed is such that isokinetic air sampling is obtained. A system incorporating a plurality of such samplers provided with air pumps set to draw air through the filter at the same fixed, predetermined rate and having different inlet opening sizes for use at different wind speeds is included within the ambit of the present invention as is a method of sampling air to measure airborne concentrations of particulate pollutants as a function of wind speed.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1979},

  month        = {1}

}

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