in search of a low-cost air quality sensor

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iSPEX is a new atmospheric measurement method in the form of a low-cost add-on for smartphone cameras. The iSPEX app instructs participants to scan the blue sky while the phone’s built-in camera takes pictures through the add-on. The photos record both the spectrum and the linear polarization of the sunlight that is scattered by suspended dust particles, and thus contain information about the properties of these particles.

2013 Dutch campaign, 2015 European campaign

Development status experimental
Price indication
Technology spectropolarimetry
Detection limit
Response time direct

Sensor issues

  • Currently the iSPEX add-on only fits iPhones 4, 4S, 5 and 5S.
  • Measurements can only done at blue sky.

Sensor evaluation

ispex.txt · Last modified: 02-09-2015 08:12 by admin