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Atmotube Portable Air-Quality Monitor
Showing 1 of 10 conversations about:
Atmotube Portable Air-Quality Monitor
TomKau
15
Aug 19, 2018
It would probably be pretty basic & no where near the size of that list of VOC's! In a lot of cases with RT gas analysis, to speciate the sample gas stream with any precision requires many different analysis chambers/techniques along with calibration relevant to target & concentration. I don't see this device being very accurate & have many years experience testing stationary source emissions & indoor air quality.
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Ceaser
2
Aug 20, 2018
TomKauThis device alarms you when air condition is not safe and dangerous for people with Astma or others sencetive to air quality! Ceaser
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TomKau
15
Aug 20, 2018
CeaserThanks for pointing that out Ceaser, I understand the concept & watched the ad too! However, the common problem with devices like this is uncertainty. Without being calibrated to a known reference standard or periodic maintenance of the device' sensors/operation there is (from what I can see given the amount of information provided) pretty much no way of knowing it's accuracy, or precision, or if it's even working properly at all!
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Ceaser
2
Aug 20, 2018
TomKauEach sensor will be first pre-calibrated by the sensor manufacturer and then will go through calibration procedure on our production line to increase its accuracy. Each sensor will be exposed to a particular gas at a known concentration in a gas chamber. In some cases Atmotube calibration settings may need to be adjusted. You can always do it from the Application Settings Menu.
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TomKau
15
Aug 20, 2018
CeaserBut if adjusting the calibration settings via app settings menu, there is no reference standard to set device accuracy to. How can a low detection limit & wide range/concentration of target analytes be measured accurately when the device (edit: sensitive electronic device) has only been spanned/zeroed/drift tested once for it's specific duty & relies on logarithmic calc for ppm/ppb resolution? I genuinely would be interested in having a look at the results & measurement repeatability data.
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Ceaser
2
Aug 20, 2018
TomKauhttps://ams.com/documents/20143/36005/CCS801_DS000457_3-00.pdf/59f95f8c-2db9-91f8-c696-0056aa4cca55 Please check this link it explains all the aspects you mentioned above
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TomKau
15
Aug 20, 2018
CeaserAh, not really.. As said I am familiar with the tech/equipment/process for determining airborne pollutants & fugitive emissions, the link is manufacturers spec for an MOX multigas sensor. The aspects I mentioned above relate directly to the product in question. Like, how can accuracy & precision be ensured if device is only calibrated to a standard once? And how precise could it actually be if reliant upon a factorised calculation? Is the device more accurate at lower concentrations or higher concentrations?
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marinocanal
1
Sep 24, 2018
TomKauHi Tom, I've been looking at several options to monitor my air at home and outdoors. I live 700 meters from a Cement and waste co-incneration plant in Spain and they have proven to go above the EU emission limit for large combustion plants quite frequently, so I'd love to be able to reliably know what i'm breathing in exactly since the local government has no measure stations near the facility.
I've had a look at the sensors by https://purpleair.com which seem to be great for pm and accuracy as they have dual sensors, but don't really measure much in regards to gases and VOCs.
I also had a look at the SainSmart line of detectors https://www.sainsmart.com/products/pure-morning-air-quality-monitor-p8
And several others.. In your experience which is the best affordable all around good detector for my situation?
My budget is around 800 AUD.
Thanks a lot guiding me, hope to hear from you.
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