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The UCB particle monitor

PostPosted: Sun Mar 15, 2009 12:25 pm
by Wilberforce
The UCB particle monitor: A tool for logging frequency of smoking and the intensity of second-hand smoke
concentrations in the home

Sean Semple et al 2009 J. Phys.: Conf. Ser. 151 012038 (8pp) doi: 10.1088/1742-6596/151/1/012038
http://www.iop.org/EJ/abstract/1742-6596/151/1/012038
"Abstract. Second-hand tobacco smoke (SHS) exposure generates a large public health burden. Recent legislation has moved to prohibit smoking in public places and there are concerns that this may lead to an increase in exposures in private homes. Measurement of SHS aerosol has tended to use active pumped samples or longer-term diffusive badges. Pumped methods are noisy and poorly tolerated in home settings while diffusive badges do not provide real-time data.
The UCB particle monitor (UCB-PM) is a modified smoke-alarm device capable of logging changes in airborne particulate matter over extended periods and has been used successfully to measure biomass fuel smoke concentrations in developing world settings This study has examined the use of the UCB-PM to measure SHS aerosol in both controlled laboratory conditions and a pilot field trial over a 7 day period in a smoker's home.
Comparisons with a pumped sampler (TSI Sidepak Personal Aerosol Monitor) indicate good agreement over a range of exposure concentrations but there is evidence of a threshold effect at approximately 0.5 mg/m3 of fine particulate measured as PM2.5.
While this threshold effect undermines the ability of the device to provide useful data on the time-weighted average SHS concentration, the field trial indicates that that the UCB-PM has a sensitivity of about 71% and a specificity of 98%. The device has many advantages including zero noise operation, low cost and long battery life and may be a useful tool in quitting and smoke-free home intervention studies."



Image

PostPosted: Sun Mar 15, 2009 1:03 pm
by Wilberforce
In the above graph from the particle counter, the actual particle mass is given as milligrams per m³
(100µg = 0.1 mg) Notice that the average air quality in the test home is into the AQI "red" zone much
of the time, even reaching the "purple" zone at times. Are smokers still exposing their children to these
dangerous levels of toxic waste inside their homes?

Here is a handy table for converting micrograms /cubic meter into Air Quality Index (AQI)
source: North Carolina Dept of Environmental Quality (from another post in tips section)
http://daq.state.nc.us/airaware/forecas ... calc.shtml

        Image

UCB monitor

PostPosted: Wed Mar 18, 2009 4:31 pm
by Smokelessinvancouver
Would that work for wood smoke?

PostPosted: Wed Mar 18, 2009 6:12 pm
by Wilberforce
Yes. From the abstract:
"The UCB particle monitor (UCB-PM) is a modified smoke-alarm device capable of logging
changes in airborne particulate matter over extended periods and has been used successfully
to measure biomass fuel smoke concentrations in developing world settings"

Re: The UCB particle monitor

PostPosted: Mon Oct 24, 2011 11:12 am
by lonely_rider
Is it a same type of sensor being used for doing this kind of measurement that are used in like this smoke alarm?

Re: The UCB particle monitor

PostPosted: Mon Oct 24, 2011 7:22 pm
by Wilberforce
Thanks for the question. Is there an English version of your link?

Re: The UCB particle monitor

PostPosted: Tue Oct 25, 2011 12:06 am
by lonely_rider
Yes, here's the link to an english version.

Re: The UCB particle monitor

PostPosted: Tue Dec 11, 2012 9:27 am
by mmiller
I get some similar graphics from testdata of a particle counter