PIN photodiode with special pulse preamplifier. Detection window, 500 nm – 580 nm
Chlorophyll fluorescence measuring light
Modulated excitation at 620 nm
Actinic light
Blue (460 nm) LED lamp for continuous actinic illumination, maximum PAR 700 μmol m-2 s-1. Chip-on-board LED array identical to that of DUAL-E measuring head