use of sensors in occupational exposure assessment
Post on 28-Jan-2018
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Use of sensors in occupational
exposure assessment
John Cherrie
Institute of Occupational Medicine, Edinburgh, UK, and Institute of Biological Chemistry, Biophysics and Bioengineering, Heriot-Watt University, Edinburgh, UK
No conflict of interest to declare
The HEALS project has received funding from the European Union’s Seventh Programme for research, technological development and demonstration under grant agreement No 603946.
Summary…
• Direct-reading monitoring in the workplace
• Low-cost sensors
• Data management
• Use outside a research study
• Criteria for a good sensor system
Scopus.com “occupational exposure measurement”
Scopus.com … plus “biological monitoring” … plus “direct-reading”
Sensor packages…
https://smartcitizen.me/
Dylos…
• Dylos DC 1700
• Laser-based particle counter
• 1 min data logging capability more than 6 days
• Quiet
• Mains operated with battery for 6 hours
• Low cost - €300
Semple S, Apsley A, MacCalman L. An inexpensive particle monitor for smoker behaviour modification in homes. Tob Control. 2013 Sep;22(5):295-8.
Sidepak PM2.5 = 0.65 + 4.16 x 10-5[Dylos particles] + 1.57x10-11[Dylos particles]2
r2 =0.86
(n=25,301)
Activity…
• Data-logging activity monitors
– Fitbit
– Actigraph, etc.
• Latest versions measure
steps (distance), heart rate,
stairs climbed
• Day-time and night (sleep)
Location…• Advantage of Moves
is it’s ability to identify
locations and activity
and summarise the
data
• However…
– Need your phone
with you
– Activity data biased
http://www.moves-app.com
Time
Example: Moves v Paper log
The technology is changing very fast
Will employers adopt these
technologies?
What about data security / privacy issues?
Criteria for a useful sensor…
• Unobtrusive
• Low-cost
• Able to collect, store and transmit real-time and
high temporal resolution data
• Usable by workers
• Meets specified QA criteria, e.g. sensitivity,
specificity, accuracy, precision and stability
• Low failure rate
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