Revisions for SEM stub monitor for particulate matter
| 16 CURRENT | warren |
January 08, 2018 15:15
| over 6 years ago
In field testing, these samplers have been demonstrated to vary (CV) only 11.6% from Federal Reference Methods, when measuring course particulates (PM10-2.5), making this the most precise published passive particle monitor design [7]. Public Lab is evaluating the deployment of this technology. SEM Stub Monitor Documentation:BackgroundDeveloped originally for indoor dust monitoring at the University of North Carolina by Jeff Wagner and David Leith, this tiny monitor (in the middle of the housing, below) consists of a fine mesh cap over top of a Scanning Electron Microscopy (SEM) pin stub, a small aluminum object that looks like a pin. Thomas Peters and Darrin Ott at the University of Iowa added a wind-and-rain housing so the monitors can be used outside. They also added a glass microscope slide cover on top of the stub, allowing lower-cost analysis with a standard visible-light microscope.
Function
Early testing by Wagner, et al. demonstrated that there was a high correlation between results from the passive sampler and impactor sampling in indoor environments [2, 4]. The wind tunnel used is described in [4]. Windy environments would require wind speed measurements to correct against. Enclosures for outdoor operationThomas Peters and his team were interested in using passive monitors for outdoor testing that would obviate the need for wind speed data. They developed a housing [6] and rigorously tested it in relation to optical and filter-based dichotomous samplers in wind tunnels and field tests [6, 7, 8]. The friction between the two plates slows air down and normalizes the deposition of particles. Wagner adapted a version of this flat plate system [10]:
Questions[questions:passive-pm] Bibliography
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| 15 | warren |
January 08, 2018 15:15
| over 6 years ago
In field testing, these samplers have been demonstrated to vary (CV) only 11.6% from Federal Reference Methods, when measuring course particulates (PM10-2.5), making this the most precise published passive particle monitor design [7]. Public Lab is evaluating the deployment of this technology. SEM Stub Monitor Documentation:BackgroundDeveloped originally for indoor dust monitoring at the University of North Carolina by Jeff Wagner and David Leith, this tiny monitor (in the middle of the housing, below) consists of a fine mesh cap over top of a Scanning Electron Microscopy (SEM) pin stub, a small aluminum object that looks like a pin. Thomas Peters and Darrin Ott at the University of Iowa added a wind-and-rain housing so the monitors can be used outside. They also added a glass microscope slide cover on top of the stub, allowing lower-cost analysis with a standard visible-light microscope.
Function
Early testing by Wagner, et al. demonstrated that there was a high correlation between results from the passive sampler and impactor sampling in indoor environments [2, 4]. The wind tunnel used is described in [4]. Windy environments would require wind speed measurements to correct against. Enclosures for outdoor operationThomas Peters and his team were interested in using passive monitors for outdoor testing that would obviate the need for wind speed data. They developed a housing [6] and rigorously tested it in relation to optical and filter-based dichotomous samplers in wind tunnels and field tests [6, 7, 8]. The friction between the two plates slows air down and normalizes the deposition of particles. Wagner adapted a version of this flat plate system [10]:
Questions[questions:sem-stub] Bibliography
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| 14 | stevie |
February 16, 2016 16:49
| about 8 years ago
In field testing, these samplers have been demonstrated to vary (CV) only 11.6% from Federal Reference Methods, when measuring course particulates (PM10-2.5), making this the most precise published passive particle monitor design [7]. Public Lab is evaluating the deployment of this technology. SEM Stub Monitor Documentation:BackgroundDeveloped originally for indoor dust monitoring at the University of North Carolina by Jeff Wagner and David Leith, this tiny monitor (in the middle of the housing, below) consists of a fine mesh cap over top of a Scanning Electron Microscopy (SEM) pin stub, a small aluminum object that looks like a pin. Thomas Peters and Darrin Ott at the University of Iowa added a wind-and-rain housing so the monitors can be used outside. They also added a glass microscope slide cover on top of the stub, allowing lower-cost analysis with a standard visible-light microscope.
Function
Early testing by Wagner, et al. demonstrated that there was a high correlation between results from the passive sampler and impactor sampling in indoor environments [2, 4]. The wind tunnel used is described in [4]. Windy environments would require wind speed measurements to correct against. Enclosures for outdoor operationThomas Peters and his team were interested in using passive monitors for outdoor testing that would obviate the need for wind speed data. They developed a housing [6] and rigorously tested it in relation to optical and filter-based dichotomous samplers in wind tunnels and field tests [6, 7, 8]. The friction between the two plates slows air down and normalizes the deposition of particles. Wagner adapted a version of this flat plate system [10]:
Bibliography
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| 13 | stevie |
February 16, 2016 15:23
| about 8 years ago
In field testing, these samplers have been demonstrated to vary (CV) only 11.6% from Federal Reference Methods, when measuring course particulates (PM10-2.5), making this the most precise published passive particle monitor design [7]. Public Lab is evaluating the deployment of this technology. SEM Stub Monitor Documentation:CapabilitiesBackgroundDeveloped originally for indoor dust monitoring at the University of North Carolina by Jeff Wagner and David Leith, this tiny monitor (in the middle of the housing, below) consists of a fine mesh cap over top of a Scanning Electron Microscopy (SEM) pin stub, a small aluminum object that looks like a pin. Thomas Peters and Darrin Ott at the University of Iowa added a wind-and-rain housing so the monitors can be used outside. They also added a glass microscope slide cover on top of the stub, allowing lower-cost analysis with a standard visible-light microscope.
Function
Early testing by Wagner, et al. demonstrated that there was a high correlation between results from the passive sampler and impactor sampling in indoor environments [2, 4]. The wind tunnel used is described in [4]. Windy environments would require wind speed measurements to correct against. Enclosures for outdoor operationThomas Peters and his team were interested in using passive monitors for outdoor testing that would obviate the need for wind speed data. They developed a housing [6] and rigorously tested it in relation to optical and filter-based dichotomous samplers in wind tunnels and field tests [6, 7, 8]. The friction between the two plates slows air down and normalizes the deposition of particles. Wagner adapted a version of this flat plate system [10]:
Bibliography
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| 12 | mathew |
February 04, 2016 01:38
| about 8 years ago
In field testing, these samplers have been demonstrated to vary (CV) only 11.6% from Federal Reference Methods, when measuring course particulates (PM10-2.5), making this the most precise published passive particle monitor design [7]. Public Lab is evaluating the deployment of this technology. SEM Stub Monitor Documentation:CapabilitiesBackgroundDeveloped originally for indoor dust monitoring at the University of North Carolina by Jeff Wagner and David Leith, this tiny monitor (in the middle of the housing, below) consists of a fine mesh cap over top of a Scanning Electron Microscopy (SEM) pin stub, a small aluminum object that looks like a pin. Thomas Peters and Darrin Ott at the University of Iowa added a wind-and-rain housing so the monitors can be used outside. They also added a glass microscope slide cover on top of the stub, allowing lower-cost analysis with a standard visible-light microscope.
Function
Early testing by Wagner, et al. demonstrated that there was a high correlation between results from the passive sampler and impactor sampling in indoor environments [2, 4]. The wind tunnel used is described in [4]. Windy environments would require wind speed measurements to correct against. Enclosures for outdoor operationThomas Peters and his team were interested in using passive monitors for outdoor testing that would obviate the need for wind speed data. They developed a housing [6] and rigorously tested it in relation to optical and filter-based dichotomous samplers in wind tunnels and field tests [6, 7, 8]. The friction between the two plates slows air down and normalizes the deposition of particles. Wagner adapted a version of this flat plate system [10]:
Bibliography
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| 11 | mathew |
February 04, 2016 01:37
| about 8 years ago
In field testing, these samplers have been demonstrated to vary (CV) only 11.6% from Federal Reference Methods, when measuring course particulates (PM10-2.5), making this the most precise published passive particle monitor design [7]. Public Lab is evaluating the deployment of this technology. SEM Stub Monitor Documentation:CapabilitiesPassive particle monitors must be deployed for 7-day periods to get accurate averages, unless airborne concentrations are above ~40μm/m3. Roughly 300 particles must be collected of a given size range to get an accurate count [8]. We are focusing development on analysis with visible light microscopy, which has demonstrated variation from FRMs of 11.6% for PM10-2.5 [7], but methods for measuring PM2.5 and ultrafine particles with a Scanning Electron Microscope (SEM) have been demonstrated [10, 12]. Current ProgressNext stepsBackgroundDeveloped originally for indoor dust monitoring at the University of North Carolina by Jeff Wagner and David Leith, this tiny monitor (in the middle of the housing, below) consists of a fine mesh cap over top of a Scanning Electron Microscopy (SEM) pin stub, a small aluminum object that looks like a pin. Thomas Peters and Darrin Ott at the University of Iowa added a wind-and-rain housing so the monitors can be used outside. They also added a glass microscope slide cover on top of the stub, allowing lower-cost analysis with a standard visible-light microscope.
Function
Early testing by Wagner, et al. demonstrated that there was a high correlation between results from the passive sampler and impactor sampling in indoor environments [2, 4]. The wind tunnel used is described in [4]. Windy environments would require wind speed measurements to correct against. Enclosures for outdoor operationThomas Peters and his team were interested in using passive monitors for outdoor testing that would obviate the need for wind speed data. They developed a housing [6] and rigorously tested it in relation to optical and filter-based dichotomous samplers in wind tunnels and field tests [6, 7, 8]. The friction between the two plates slows air down and normalizes the deposition of particles. Wagner adapted a version of this flat plate system [10]:
Bibliography
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| 10 | mathew |
February 04, 2016 00:52
| about 8 years ago
In field testing, these samplers have been demonstrated to vary (CV) only 11.6% from Federal Reference Methods, when measuring course particulates (PM10-2.5), making this the most precise published passive particle monitor design [7]. Public Lab is evaluating the deployment of this technology. SEM Stub Monitor Documentation:CapabilitiesBackgroundDeveloped originally for indoor dust monitoring at the University of North Carolina by Jeff Wagner and David Leith, this tiny monitor (in the middle of the housing, below) consists of a fine mesh cap over top of a Scanning Electron Microscopy (SEM) pin stub, a small aluminum object that looks like a pin. Thomas Peters and Darrin Ott at the University of Iowa added a wind-and-rain housing so the monitors can be used outside. They also added a glass microscope slide cover on top of the stub, allowing lower-cost analysis with a standard visible-light microscope.
Function
Early testing by Wagner, et al. demonstrated that there was a high correlation between results from the passive sampler and impactor sampling in indoor environments [2, 4]. The wind tunnel used is described in [4]. Windy environments would require wind speed measurements to correct against. Enclosures for outdoor operationThomas Peters and his team were interested in using passive monitors for outdoor testing that would obviate the need for wind speed data. They developed a housing [6] and rigorously tested it in relation to optical and filter-based dichotomous samplers in wind tunnels and field tests [6, 7, 8]. The friction between the two plates slows air down and normalizes the deposition of particles. Wagner adapted a version of this flat plate system [10]:
Bibliography
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| 9 | mathew |
February 04, 2016 00:51
| about 8 years ago
In field testing, these samplers have been demonstrated to vary (CV) only 11.6% from Federal Reference Methods, when measuring course particulates (PM10-2.5), making this the most precise published passive particle monitor design [7]. Public Lab is evaluating the deployment of this technology. SEM Stub Monitor Documentation:CapabilitiesBackgroundDeveloped originally for indoor dust monitoring at the University of North Carolina by Jeff Wagner and David Leith, this tiny monitor (in the middle of the housing, below) consists of a fine mesh cap over top of a Scanning Electron Microscopy (SEM) pin stub, a small aluminum object that looks like a pin. Thomas Peters and Darrin Ott at the University of Iowa added a wind-and-rain housing so the monitors can be used outside. They also added a glass microscope slide cover on top of the stub, allowing lower-cost analysis with a standard visible-light microscope.
Function
Early testing by Wagner, et al. demonstrated that there was a high correlation between results from the passive sampler and impactor sampling in indoor environments [2, 4]. The wind tunnel used is described in [4]. Windy environments would require wind speed measurements to correct against. Enclosures for outdoor operationThomas Peters and his team were interested in using passive monitors for outdoor testing that would obviate the need for wind speed data. They developed a housing [6] and rigorously tested it in relation to optical and filter-based dichotomous samplers in wind tunnels and field tests [6, 7, 8]. The friction between the two plates slows air down and normalizes the deposition of particles.
Wagner adapted a version of this flat plate system [10]:
Bibliography
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| 8 | mathew |
February 04, 2016 00:51
| about 8 years ago
In field testing, these samplers have been demonstrated to vary (CV) only 11.6% from Federal Reference Methods, when measuring course particulates (PM10-2.5), making this the most precise published passive particle monitor design [7]. Public Lab is evaluating the deployment of this technology. SEM Stub Monitor Documentation:CapabilitiesBackgroundDeveloped originally for indoor dust monitoring at the University of North Carolina by Jeff Wagner and David Leith, this tiny monitor (in the middle of the housing, below) consists of a fine mesh cap over top of a Scanning Electron Microscopy (SEM) pin stub, a small aluminum object that looks like a pin. Thomas Peters and Darrin Ott at the University of Iowa added a wind-and-rain housing so the monitors can be used outside. They also added a glass microscope slide cover on top of the stub, allowing lower-cost analysis with a standard visible-light microscope.
Function
Early testing by Wagner, et al. demonstrated that there was a high correlation between results from the passive sampler and impactor sampling in indoor environments [2, 4]. The wind tunnel used is described in [4]. Windy environments would require wind speed measurements to correct against. Enclosures for outdoor operationThomas Peters and his team were interested in using passive monitors for outdoor testing that would obviate the need for wind speed data. They developed a housing [6] and rigorously tested it in relation to optical and filter-based dichotomous samplers in wind tunnels and field tests [6, 7, 8]. The friction between the two plates slows air down and normalizes the deposition of particles.
Wagner adapted a version of this flat plate system [10]:
Bibliography
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| 7 | mathew |
February 04, 2016 00:31
| about 8 years ago
In field testing, these samplers have been demonstrated to vary (CV) only 11.6% from Federal Reference Methods, when measuring course particulates (PM10-2.5), making this the most precise published passive particle monitor design (Ott, Cyrs, & Peters, 2008). Public Lab is evaluating the deployment of this technology. SEM Stub Monitor Documentation:BackgroundDeveloped originally for indoor dust monitoring at the University of North Carolina by Jeff Wagner and David Leith, this tiny monitor (in the middle of the housing, below) consists of a fine mesh cap over top of a Scanning Electron Microscopy (SEM) pin stub, a small aluminum object that looks like a pin. Thomas Peters and Darrin Ott at the University of Iowa added a wind-and-rain housing so the monitors can be used outside. They also added a glass microscope slide cover on top of the stub, allowing lower-cost analysis with a standard visible-light microscope.
Citation: Darrin K. Ott, William Cyrs, Thomas M. Peters, Passive measurement of coarse particulate matter, PM10-2.5, Aerosol Science 39:156 – 167, 2008 CapabilitiesFunction
From [2]:
deposition [3]
Early testing by Wagner, et al. demonstrated that there was a high correlation between results from the passive sampler and impactor sampling in indoor environments [2, 4]. The wind tunnel used is described in [4]. Windy environments would require wind speed measurements to correct against. Enclosures for outdoor operationThomas Peters and his team were interested in using passive monitors for outdoor testing that would obviate the need for wind speed data. They developed a housing [6] and rigorously tested it in relation to optical and filter-based dichotomous samplers in wind tunnels and field tests [6, 7, 8].
Wagner adapted a version of this flat plate system [10]:
Bibliography
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| 6 | mathew |
February 04, 2016 00:25
| about 8 years ago
In field testing, these samplers have been demonstrated to vary (CV) only 11.6% from Federal Reference Methods, when measuring course particulates (PM10-2.5), making this the most precise published passive particle monitor design (Ott, Cyrs, & Peters, 2008). Public Lab is evaluating the deployment of this technology. SEM Stub Monitor Documentation:BackgroundDeveloped originally for indoor dust monitoring at the University of North Carolina by Jeff Wagner and David Leith, this tiny monitor (in the middle of the housing, below) consists of a fine mesh cap over top of a Scanning Electron Microscopy (SEM) pin stub, a small aluminum object that looks like a pin. Thomas Peters and Darrin Ott at the University of Iowa added a wind-and-rain housing so the monitors can be used outside. They also added a glass microscope slide cover on top of the stub, allowing lower-cost analysis with a standard visible-light microscope.
Citation: Darrin K. Ott, William Cyrs, Thomas M. Peters, Passive measurement of coarse particulate matter, PM10-2.5, Aerosol Science 39:156 – 167, 2008 Capabilities |
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| 5 | mathew |
February 04, 2016 00:24
| about 8 years ago
In field testing, these samplers have been demonstrated to vary (CV) only 11.6% from Federal Reference Methods, when measuring course particulates (PM10-2.5), making this the most precise published passive particle monitor design (Ott, Cyrs, & Peters, 2008). Public Lab is evaluating the deployment of this technology. SEM Stub Monitor Documentation: BackgroundDeveloped originally for indoor dust monitoring at the University of North Carolina by Jeff Wagner and David Leith, this tiny monitor (in the middle of the housing, below) consists of a fine mesh cap over top of a Scanning Electron Microscopy (SEM) pin stub, a small aluminum object that looks like a pin. Thomas Peters and Darrin Ott at the University of Iowa added a wind-and-rain housing so the monitors can be used outside. They also added a glass microscope slide cover on top of the stub, allowing lower-cost analysis with a standard visible-light microscope.
Citation: Darrin K. Ott, William Cyrs, Thomas M. Peters, Passive measurement of coarse particulate matter, PM10-2.5, Aerosol Science 39:156 – 167, 2008 Capabilities |
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| 4 | mathew |
February 04, 2016 00:24
| about 8 years ago
In field testing, these samplers have been demonstrated to vary (CV) only 11.6% from Federal Reference Methods, when measuring course particulates (PM10-2.5), making this the most precise published passive particle monitor design (Ott, Cyrs, & Peters, 2008). Public Lab is evaluating the deployment of this technology. SEM Stub Monitor Documentation: BackgroundDeveloped originally for indoor dust monitoring at the University of North Carolina by Jeff Wagner and David Leith, this tiny monitor (in the middle of the housing, below) consists of a fine mesh cap over top of a Scanning Electron Microscopy (SEM) pin stub, a small aluminum object that looks like a pin. Thomas Peters and Darrin Ott at the University of Iowa added a wind-and-rain housing so the monitors can be used outside. They also added a glass microscope slide cover on top of the stub, allowing lower-cost analysis with a standard visible-light microscope.
Citation: Darrin K. Ott, William Cyrs, Thomas M. Peters, Passive measurement of coarse particulate matter, PM10-2.5, Aerosol Science 39:156 – 167, 2008 Capabilities |
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| 3 | mathew |
February 04, 2016 00:23
| about 8 years ago
In field testing, these samplers have been demonstrated to vary (CV) only 11.6% from Federal Reference Methods, when measuring course particulates (PM10-2.5), making this the most precise published passive particle monitor design (Ott, Cyrs, & Peters, 2008). Public Lab is evaluating the deployment of this technology. SEM Stub Monitor Documentation: Assembly Deployment Imaging Analysis BackgroundDeveloped originally for indoor dust monitoring at the University of North Carolina by Jeff Wagner and David Leith, this tiny monitor (in the middle of the housing, below) consists of a fine mesh cap over top of a Scanning Electron Microscopy (SEM) pin stub, a small aluminum object that looks like a pin. Thomas Peters and Darrin Ott at the University of Iowa added a wind-and-rain housing so the monitors can be used outside. They also added a glass microscope slide cover on top of the stub, allowing lower-cost analysis with a standard visible-light microscope.
Citation: Darrin K. Ott, William Cyrs, Thomas M. Peters, Passive measurement of coarse particulate matter, PM10-2.5, Aerosol Science 39:156 – 167, 2008 Capabilities |
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| 2 | mathew |
February 04, 2016 00:22
| about 8 years ago
In field testing, these samplers have been demonstrated to vary (CV) only 11.6% from Federal Reference Methods, when measuring course particulates (PM10-2.5), making this the most precise published passive particle monitor design (Ott, Cyrs, & Peters, 2008). Public Lab is evaluating the deployment of this technology. SEM Stub Monitor Documentation: Developed originally for indoor dust monitoring at the University of North Carolina by Jeff Wagner and David Leith, this tiny monitor (in the middle of the housing, below) consists of a fine mesh cap over top of a Scanning Electron Microscopy (SEM) pin stub, a small aluminum object that looks like a pin. Thomas Peters and Darrin Ott at the University of Iowa added a wind-and-rain housing so the monitors can be used outside. They also added a glass microscope slide cover on top of the stub, allowing lower-cost analysis with a standard visible-light microscope.
Citation: Darrin K. Ott, William Cyrs, Thomas M. Peters, Passive measurement of coarse particulate matter, PM10-2.5, Aerosol Science 39:156 – 167, 2008 |
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| 1 | mathew |
February 04, 2016 00:20
| about 8 years ago
In field testing, these samplers have been demonstrated to vary (CV) only 11.6% from Federal Reference Methods, when measuring course particulates (PM10-2.5), making this the most precise published passive particle monitor design (Ott, Cyrs, & Peters, 2008). Public Lab is evaluating the deployment of this technology. SEM Stub Monitor Documentation: Assembly Deployment Imaging Analysis Developed originally for indoor dust monitoring at the University of North Carolina by Jeff Wagner and David Leith, this tiny monitor (in the middle of the housing, below) consists of a fine mesh cap over top of a Scanning Electron Microscopy (SEM) pin stub, a small aluminum object that looks like a pin. Thomas Peters and Darrin Ott at the University of Iowa added a wind-and-rain housing so the monitors can be used outside. They also added a glass microscope slide cover on top of the stub, allowing lower-cost analysis with a standard visible-light microscope.
Citation: Darrin K. Ott, William Cyrs, Thomas M. Peters, Passive measurement of coarse particulate matter, PM10-2.5, Aerosol Science 39:156 – 167, 2008 |
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| 0 | mathew |
February 04, 2016 00:17
| about 8 years ago
In field testing, these samplers have been demonstrated to vary (CV) only 11.6% from Federal Reference Methods, when measuring course particulates (PM10-2.5), making this the most precise published passive particle monitor design (Ott, Cyrs, & Peters, 2008). Public Lab is evaluating the deployment of this technology. Developed originally for indoor dust monitoring at the University of North Carolina by Jeff Wagner and David Leith, this tiny monitor (in the middle of the housing, below) consists of a fine mesh cap over top of a Scanning Electron Microscopy (SEM) pin stub, a small aluminum object that looks like a pin. Thomas Peters and Darrin Ott at the University of Iowa added a wind-and-rain housing so the monitors can be used outside. They also added a glass microscope slide cover on top of the stub, allowing lower-cost analysis with a standard visible-light microscope.
Analysis is performed in ImageJ. roughly:
[Read More] Citation: Darrin K. Ott, William Cyrs, Thomas M. Peters, Passive measurement of coarse particulate matter, PM10-2.5, Aerosol Science 39:156 – 167, 2008 |
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