The UCB particle monitor

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The UCB particle monitor

Postby Wilberforce » Sun Mar 15, 2009 12:25 pm

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."



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Postby Wilberforce » Sun Mar 15, 2009 1:03 pm

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

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UCB monitor

Postby Smokelessinvancouver » Wed Mar 18, 2009 4:31 pm

Would that work for wood smoke?
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Postby Wilberforce » Wed Mar 18, 2009 6:12 pm

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"
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Re: The UCB particle monitor

Postby lonely_rider » Mon Oct 24, 2011 11:12 am

Is it a same type of sensor being used for doing this kind of measurement that are used in like this smoke alarm?
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Re: The UCB particle monitor

Postby Wilberforce » Mon Oct 24, 2011 7:22 pm

Thanks for the question. Is there an English version of your link?
• The Surgeon General has determined that there is no safe level of exposure to ambient smoke!

• If you smell even a subtle odor of smoke, you are being exposed to poisonous and carcinogenic chemical compounds!

• Even a brief exposure to smoke raises blood pressure, (no matter what your state of health) and can cause blood clotting, stroke, or heart attack in vulnerable people. Even children experience elevated blood pressure when exposed to smoke!

• Since smoke drastically weakens the lungs' immune system, avoiding smoke is one of the best ways to prevent colds, flu, bronchitis, or risk of an even more serious respiratory illness, such as pneumonia or tuberculosis! Does your child have the flu? Chances are they have been exposed to ambient smoke!
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Re: The UCB particle monitor

Postby lonely_rider » Tue Oct 25, 2011 12:06 am

Yes, here's the link to an english version.
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Re: The UCB particle monitor

Postby mmiller » Tue Dec 11, 2012 9:27 am

I get some similar graphics from testdata of a particle counter
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