AIHCe Student Poster winner: Development of a low-cost environmental sensor....


Cryder, Sleeth, Zhang, Min, Zhang, Collingwood.  University of Utah

Utah Modified Dylos (UMDS)


Added Wi-Fi and other sensors but did not change how the sensor detected PM

Each device must be calibrated separately


Calibrate in the target environment


PM2.5 and PM10

A powerful tool

".. light scattering based instruments can yield consistent data for time-weighted average, full shift respirable aerosol concentrations.  However the field experience indicated that attention needs to be given to the calibration of such instruments for each application, in full recognition of the influences of aerosol type and particle size distribution.  Occupational hygienists should be encouraged but cautious."

Direct-read aerosol instruments have been around since 1934

Aerosol Sampling, Science, Standards, Instrumentation and Applications, James H. Vincent, 2007

A popular researcher's tool

The Dylos products have been used around the world

Photo from Modeling fine particulate concentrations inside the homes of pregnant women in Ulaanbaantar, Mongolia, Weiran Yuchi, Simon Fraser University


Low-Cost Air Quality Monitoring Methods to Assess Compliance

Angela Jackson-Morris et al, 2016, Nicotine & Tobacco Research.   "Many low- and middle-income countries (LMICs) have enacted legislation banning smoking in public places, yet enforcement remains challenging.  The aim of this study was to assess the feasibility of using a validated low-cost methodology (the Dylos DC1700) to provide objective evidence of smoke-free (SF) law compliance in hospitality venues in urban LMIC settings, where outdoor pollution levels are generally high."

"This study suggests that low-cost air quality monitoring is a viable method for improving knowledge about environmental SHS and can provide indicative data on compliance with local and national SF legislation..."

Linear Response

The Dylos was modified into the BAIRS (Berkeley Aerosol In

 In the early beginnings of the Dylos product, a UC-Berkeley researcher studied its performance.  Able to precisely measure at high and low concentrations.  From  1 ug/m3 to 1 mg/m3.