Environmental
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LI-COR Quantum Sensors
Quantum sensors measure photosynthetically
active radiation (PAR) in the 400 to 700 nm waveband. The unit
of measurement is micromoles per second per square meter (µmol
s-1m-2). LI-COR manufactures a variety
of quantum sensors to meet a broad range of applications (see
bar at left).
The quantum sensor is designed to measure PAR incident on a flat plane. The sensor response (22K) approximates the photosynthetic response of plants. A silicon photodiode is used as the detector. Error calculations indicate that under sun-and-sky radiation, and various natural or artificial light sources, the relative errors are less than ± 5%.
Typical applications for this sensor are; measuring PAR within plant canopies, greenhouses, controlled environment chambers, confined laboratory conditions, or at remote environmental monitoring sites.
LI-COR quantum sensors can be hand held or mounted at any angle. The quantum sensor is most commonly used by setting it on a level surface free from any obstruction to direct or diffuse radiation. The sensor may be conveniently leveled using the LI-COR 2003S Mounting and Leveling Fixture.
