John Beale
I just came across the Air Quality Egg project. I appreciate the idea and the availability of low-cost air quality sensors. I would like to suggest that you make some attempt to display a reasonable number of significant digits for your measurements. For example, when I see a measurement listed to eight digits, such as "Temperature: 21.89999961 C" I would normally expect that the sensing device could actually resolve 0.000 000 01 degrees C, which is 10 nano-degrees C. Impressive, but I believe that precision has no connection with reality.
If a sensor measurement only resolves 0.01 C then you should report only that number of digits, or at most one additional digit if there is a math operation (eg. units conversion) where roundoff could have any impact.
NeilH
This is an excellent comment - however if you read the other posts, there is no calibration to the data so practically speaking there is no trace-ability for the numbers generated.
The EPA "Air Sensor 2013: Data QUaltiy & Applications" conference is asking what standards are applicable for equipment and look at the range of personal equipment, some of them can be good and some of them can be junk.
The AirEgg features on the pictures - so I guess they will be asking where on the spectrum does an uncalibrated sensors numbers lie.