Hansatech Instruments, UK. Handy PEA +

The Handy Pea is supplied by control unit and sensor with 3 ultra-bright red LEDs which are filtered
to a peak of wavelenght of 650 nm, up to a maximum intensity of 3500 µmol m s . After a dark
adaptation period (using the leafclip), leaves were exposed to a saturating red actinic light pulse
of 3500 µmol photons m s of 1 second duration. The kinetics of polyphasic prompt fluorescence rise
(PF) was recorded. Another important role of leafclip is to shield the fluorescence detector from
ambient light. For the first 300 µ seconds data is sampled at 10 µ second intervals.
Since the kinetic activity reduces, the subsequent induction phases is recorded at lower rate.

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