BC compensation publication: Caubel, J.; Cados, T.; Kirchstetter, T. "A
New Black Carbon Sensor for Dense Air Quality Monitoring Networks".
Sensors 18.3 (2018): 738-745.
1.2.2. Gas compensation
The electrochemical cells can also be compensated for environmental
sensitivity, but this is not done at the DSTech factory (like black carbon).
The electrochemical cells’ sensitivity varies depending on operating
conditions, and so compensation factors derived in the lab tend to drift
significantly when the sensor is deployed to the field. As a result, it is best
to derive compensation factors by collocating the ObservAir with a
reference instrument in the intended deployment location. This calibration
should be conducted after the sensors have been allowed to acclimate to
operating conditions for at least a few days. Gas concentration data from
the ObservAir and reference instrument is sent to DSTech, and
compensation factors are derived and uploaded remotely by our staff
using the online portal. The environmental sensitivity of each gas cell is
compensated using a multivariate linear model, derived with machine
learning. Please contact us at info@dstech.io for more information on this
procedure.
1.3. Base package contents
Each ObservAir comes with the following base set of accessories and
supplies:
• 10 replacement filter tabs
• Micro-SD card with 16 GB capacity
• Charger (US Plug) and 3-foot (1 m) micro-USB cable
• 1-foot length of conductive sample line
• Zero-calibration sheet
• Quick-start guide
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