[Stoves] PM measurement with Speck

[David Young]

On Wed, Jun 10, 2015 at 01:23:25PM -0700, Erin Rasmussen wrote:
> What sort of technology does the Speck use? 
> 
> The Speck utilizes an inexpensive Syhitech DSM501A dust sensor
> <http://www.chinaeds.com/zl/20123814144392849_DSM501APDF.pdf>  and includes
> a small fan to increase airflow. We use machine learning to improve accuracy
> and individually calibrate each unit. The Speck is powered via USB and
> contains on-board data storage that can hold up to about 2 years worth of
> data. Each unit is also Wi-Fi enabled, so you can easily upload your data to
> our online data repository and access your indoor air quality information
> from anywhere. 

Looking at the Speck product description and the Syhitech DSM501A
documentation (such as it is), I wonder if/how Speck can differentiate
several 2.5-micron-diameter particles from a solitary particle that is
10s or 100s of microns in diameter.

Dave

-- 
David Young
dyoung at pobox.com    Urbana, IL    (217) 721-9981