[Stoves] PM measurement with Speck

Wed Jun 10 15:23:25 CDT 2015

>From the Speck FAQ  - :-) Erin 

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. 

What is the Speck's accuracy? 

We calibrated the Speck using Met One 2μm particle counters and found a very
strong correlation (r2 of 0.9 or higher) during in-home pollution events
such as cooking. We also continue to improve our calibration and quality
control processes to improve accuracy and precision. 

What range of particulate size does the Speck measure? 

The Speck is maximally sensitive to 0.5 - 3.0 micron particulates in the
air. These are the pollution components most responsible for asthma,
arrhythmia, cardiovascular disease, COPD, pulmonary disease and many other
quality of life issues. Mold spores and some allergens (e.g. pet dander)
also often include this size range, and so the Speck will notice when these
peak in a home as well. However, the Speck cannot identify what types of
particles are in the air; so, it's an indirect form of detection, but can be
useful nevertheless. 

Is the Speck capable of measuring anything other than PM2.5? 

The Speck reports out temperature and fine particulate levels only.
Particulates can be measured inexpensively and reliably, and as you know
they are also a very important part of indoor air issues, since they are
connected to such a large array of diseases; so, we start here. 

There are devices that measure CO2 or CO, but do not offer a full picture of
air quality; CO is a deadly gas; and CO2 gives you a sense of how stale the
air is. VOCs, on the other hand, are important to monitor to gauge air
quality, because they are important factors for long-term cancer risk.
However, there are no available inexpensive VOC sensors that are reliable
long-term. We are still looking, and when we find one we'll certainly make
it available. 

From: Stoves [mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of
Frank Shields
Sent: Tuesday, June 09, 2015 9:04 PM
To: Discussion of biomass cooking stoves
Subject: Re: [Stoves] PM measurement with Speck

Dear Paul,

Unless I missed it there is no info regarding as to how it works. 

Not much to say about it unless we know the science behind the values. 

Frank Shields
franke at cruzio.com

On Jun 9, 2015, at 8:31 PM, Paul Anderson <psanders at ilstu.edu> wrote:

Stovers,

Except for Crispin's accidental "pocket reply", there has been no reply
about the Speck equipment for PM measurement.   Is anyone familiar with it?

I did have one reply (thank you) off-list from James Schoner, my IT
specialist who is the Administrator of my     drtlud.com   website:   

After reading your post to the Stoves discussion group about Speck, I went
to their website and looked at the FAQ (frequently asked questions), and I
noticed they have an open source Chrome app for Speck for downloading
time-series data to one's own hard drive for use by one's own applications
or websites.   In other words, if you run this device, we can use (and even
modify) the app to integrate Speck data into your own website or app for
analyzing, charting, or monitoring as you wish.

Just something to keep in mind if the need ever arises.

Original message with link:

Stovers,

Does anyone have any info about the Speck Sensor in relation to PM
measurement for HAP, especially regarding cookstoves in developing
societies?   Seems like a natural addition to our testing tools and some of
you are possibly already using it.   

https://www.specksensor.com/

This info from June 2015 Issue (#70) of the Alliance for Green Heat

Focus on Innovation            

<http://r20.rs6.net/tn.jsp?f=001iDKUY1OGMky7jCHG5Rmu0b8RQ4dycRo5oxdArCuSPKcz
B8pezadlpI17Rsm5qgQpFynGxTYi3gk-hs3FM5wGqB9bZAMWiYFOZGYwry8D4OhuviflXpmwB_mk
5-v4G9Ble9iacZIt_Z9fOjO9CpShlGvR656435hKQS5n5sSpz-T5wgGwKCpt7Pdxm_ddBzR65dC1
JxllXFjs0U24ZHd03Md1TIqoPXAXOilOtn0jQ_0gu5ogoBGtMRy49G97VelMz_py3Ze7l8ePYq4E
kO8rvAlxgh6UqxYWxIKYQ2eiu6xvm19oXMdrIfE0qzqBfEcTLgQofuv5KEE=&c=otURnvJIUpxqz
pPxKvZ3DzsskYJZuyDdo7a2794seuh6S2KxT7pnzQ==&ch=na7qIZAYeVhXlbHRKvG0JskQz_20h
UmtVRKbtcNOTTZn9KfXAypMtQ==> Can Speck revolutionize PM monitoring? 

Speck is a $200 air quality monitor that detects and data logs fine
particulate matter in your indoor environment and informs you about trends
and changes in particle concentration. We look forward to seeing if Speck
shows indoor PM spikes when wood or pellet stoves are in use.

I hope we have more responses this time because the topic of PM monitoring
should be important.

Paul

Doc  /  Dr TLUD  /  Prof. Paul S. Anderson, PhD  
Email:  psanders at ilstu.edu   
Skype: paultlud      Phone: +1-309-452-7072
Website:  www.drtlud.com <http://www.drtlud.com/> 

On 6/6/2015 2:19 PM, ajheggie at gmail.com wrote:

[Default] On Sat, 6 Jun 2015 19:07:19 +0700,Crispin Pemberton-Pigott
 <mailto:crispinpigott at outlook.com> <crispinpigott at outlook.com> wrote:

BBM 'Crispin'

BBM?

AJH

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