Instrument: Photosynthetically Available Radiation Sensor
A PAR sensor measures photosynthetically available (or active) radiation. The sensor measures photon flux density (photons per second per square meter) within the visible wavelength range (typically 400 to 700 nanometers). PAR gives an indication of the total energy available to plants for photosynthesis. This instrument name is used when specific type, make and model are not known.
Surface PAR Biospherical Instruments QSR-240 s/n 6294 Calibrated 13 March 2008
Aquatic PAR Biospherical Instruments s/n QSP-200L4 s/n 4550 Calibrated 13 March 2008