Low-Cost IAQ Monitors: Do you get what you pay...
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Bre� Singer and Woody Delp Lawrence Berkeley Na�onal Laboratory Low-Cost IAQ Monitors: Do you get what you pay for? 2017 RESNET CONFERENCE Sco�sdale AZ 28-Feb-2017 Sydney Roberts Southface Energy Ins�tute
Transcript of Low-Cost IAQ Monitors: Do you get what you pay...
Bre�SingerandWoodyDelpLawrenceBerkeleyNa�onalLaboratory
Low-CostIAQMonitors:Doyougetwhatyoupayfor?
2017RESNETCONFERENCESco�sdaleAZ28-Feb-2017
SydneyRobertsSouthfaceEnergyIns�tute
Excellentorverygood
Good/almostalwaysacceptable
Some�mesnotacceptable
Frequentlynotacceptable
Pollutantconcentra�onsatsafelevels
Safe Hazardous
AmbientAQstandards
Referenceexposure
levels
Concentra�on
pDRPurpleAir
AWAIRSpeck
AirVisual NODE
PM2.
5 (μ
·m-3
)
0
100
200
300
400
500
600
18:00 21:00 0:00Feb 24 & Feb 25
Candles
Chalk Candles
pDR(black)isresearchgrademonitor
pDRPurpleAir
AWAIRSpeck
AirVisual NODE
PM2.
5 (μ
·m-3
)
0
20
40
60
80
100
120
140
10:00 12:00 14:00 16:00Feb 25 - 2017
FrenchToast
Bacon
pDR(black)isresearchgrademonitor
Internetdown
pDRPurpleAir
AWAIRSpeck
AirVisual NODE
PM2.
5 (μ
·m-3
)
0
100
200
300
400
500
600
700
8:00 10:00 12:00 14:00Feb 26 - 2017
Friedeggs
Quesadilla
pDR(black)isresearchgrademonitor
TVOC Odors
Irritants Allergens
Dampness&mold
TVOC Odors
Peopledetecttheseeasily
ultrafines Acrolein
Irritants Allergens
ultrafines
Dampness&mold
TVOC Odors
Nothingaccurateandaffordableisavailable
ultrafines Acrolein NO2
Irritants Allergens
Ozoneultrafines NO2
Dampness&mold
CO2fordemandcontrolven�la�on VOCs Odors
Candetectrelevantlevels,butexpensiveandrequiresfrequentcalibra�ons
ultrafines Acrolein NO2
Formaldehyde,radon Irritants Allergens
Ozoneultrafines NO2
Dampness&mold
CO2fordemandcontrolven�la�on VOCs Odors
Rela�velyinexpensive�me-integratedtestsavailable
ultrafines Acrolein NO2 CO
Formaldehyde,radon Irritants Allergens
Ozoneultrafines NO2
Dampness&mold
Temperatureandhumidity CO2fordemandcontrolven�la�on VOCs Odors
Inexpensivesensorsavailable,accurateenoughanddurable(2+y)
PM2.5,PM10 ultrafines Acrolein NO2 CO
Formaldehyde,radon Irritants Allergens
DieselPM/blackcarbon Ozone PM2.5,PM10 ultrafines NO2
Dampness&mold
Temperatureandhumidity CO2fordemandcontrolven�la�on VOCs Odors
Inexpensivesensorsavailableandaccurateenough;durabilityuncertain
PM2.5,PM10, ultrafines Acrolein NO2 CO
Formaldehyde,radon Irritants Allergens
DieselPM/blackcarbon Ozone PM2.5,PM10,ultrafines NO2
Dampness&mold
Temperatureandhumidity CO2fordemandcontrolven�la�on VOCs Odors
Inexpensiveandaccurateenoughsensorsbeingusedforresearch
PM2.5,PM10, ultrafines Acrolein NO2 CO
Formaldehyde,radon Irritants Allergens
DieselPM/blackcarbon Ozone PM2.5,PM10,ultrafines NO2
Dampness&mold
Temperatureandhumidity CO2fordemandcontrolven�la�on VOCs Odors
InexpensiveAvailable,butcostlyComingsoon
Device Price Temp RH CO2 VOC PM2.5 PM10 CO Ozone NO2
Birdi (NA) $119
Koto Air Cubes $139
Netatmo $149
Speck $149
Airmentor $183
Awair $199
BlueAir-Aware $199
Foobot $199
Air Quality Egg $280
Dylos-DC 1100 $290
uHoo (NA) $299
Device Price Temp RH CO2 VOC PM2.5 PM10 CO Ozone NO2
Birdi (NA) $119
Koto Air Cubes $139
Netatmo $149
Speck $149
Airmentor $183
Awair $199
BlueAir-Aware $199
Foobot $199
Air Quality Egg $280
Dylos-DC 1100 $290
uHoo (NA) $299
SomewhatYes No NotclearfromproductliteratureCredit:LaurenLawson
Source:NARSTO(2004)2.5
PM2.5
Source:NARSTO(2004)2.5
PM2.5
Kleeman,Schauer,Cass(1999)ES&T
Burningoakwood Meatcharbroiling Smokingcigare�e
Volumedistrib
u�on
Massdistrib
u�on
Lowcostsensorsseeonlytheparttorightofredline
Integratednumber(hours–day)
Real-�me(seconds–hour)
Researchdevices:$1000sto>$10K
Islikelookingoutanarrowdoorway
Somethingpassesbyandblocksthedoorwaygenera�ngapulse
Longer/biggerpulseisabiggerpar�cle
Sca�eringLight
Miesca�eringduetofog(waterdroplets)
Researchgrade Lowcostdevice
BaresensorOEMpricing$4-$15
OEMpricing$100s
Moldedplas�chousingTolerances?
Researchgrade Lowcostdevice
MachinedhousingClosetolerances
HeaterinducesaflowthroughthedeviceControl?
Researchgrade Lowcostdevice
Pumpforcontrolledflows
Op�calchambergetsloadedwithdust,poten�allychangingtheflowandresponse
Researchgrade Lowcostdevice
Sheathflowkeepstheop�calchamberclean
h�p://mobilesensingtechnology.com/
h�p://www.osbss.com/
Thisismostdifficultformostusers.Needmanufacturersandstandardstoensurequality.
h�ps://www.epa.gov/air-sensor-toolbox
h�p://www.aqmd.gov/aq-spec/home
h�ps://explorables.cmucreatelab.org/explorables/air-quality-monitor-tests/
h�p://aqicn.org/sensor/
$280
CloudStorage Yes
Devices n/a
PM,T,RH
Group R2
EPA -.06to0.40
SCAQMD 0.79to0.85
CMU 0.72
$250
CloudStorage Yes
Devices Android
PM
Group R2
EPA 0.65to0.66
SCAQMD 0.65to0.70
CMU n/a
$199
CloudStorage Yes
Devices iOS,Android
Group R2
EPA n/a
SCAQMD 0.55
CMU 0.25
PM,T,RH,CO2,CO,tVOC
9
$199
CloudStorage Yes
Devices ?
Group R2
EPA n/a
SCAQMD 0.77to0.92
CMU n/a
PM
$199
CloudStorage Yes
Devices iOS,Android
Group R2
EPA 0.01
SCAQMD 0to0.25
CMU 0.61
PM
Dacunto(2015)
Dacunto(2015)
Yep.It’scomplicated.
LBNLworkingonbibliographyofscien�ficpapersofsensorperformance.
