16
meter and sensor head. See Apogee webpage for further details on how to extend sensor cable length:
(http://www.apogeeinstruments.com/how-to-make-a-weatherproof-cable-splice/).
Unit Conversion Charts
Apogee MQ series quantum sensors are calibrated to measure PPFD in units of µmol m
-2
s
-1
. Units other than photon flux
density (e.g., energy flux density, illuminance) may be required for certain applications. It is possible to convert the PPFD
value from a quantum sensor to other units, but it requires spectral output of the radiation source of interest. Conversion
factors for common radiation sources can be found on the Unit Conversions page in the Support Center on the Apogee
website (http://www.apogeeinstruments.com/unit-conversions/). A spreadsheet to convert PPFD to energy flux density or
illuminance is also provided on the Unit Conversions page in the Support Center on the Apogee website
(http://www.apogeeinstruments.com/content/PPFD-to-Illuminance-Calculator.xls).
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