M-PEA Control Unit

  • Electronics:
    • 1 x high-performance 16-bit microcontroller
    • 1 x enhanced flash 8-bit controller
    • Dual channels:
      • 1 x modulated
      • 1 x non-modulated
    • 16-bit resolution A/D 10μs acquisition rate
    • Dual 16-bit D/A light source  controller
  • Memory: 32 Mb internal memory storage
  • Display: 4-line x 20-character LCD
  • Recording: Duration 0.001 seconds – 300 seconds (repeatable up to 100 x per protocol)
  • Comms: USB 2.0 full speed (12 Mb/s)
  • Power: 12V DC @ 1 amp
  • Dimensions: 230mm (w) x 190mm (d) x 85mm (h). 1.4kg

M-PEA-1 Optical Sensor Unit

  • Illumination:
    • Actinic:
      • Focused ultra-bright LED with NIR short- pass cut-off filter
      • Dominant λ625nm
      • Spectral half-width 20nm
      • Max intensity 5,000 μmol m-2 s-1.
    • Far-red:
      • Focused ultra-bright LED with long-pass filter
      • Max intensity >1,000 μmol m-2 s-1
    • P700:
      • Optically filtered pulse-modulated 820nm LED
      • Intensity 0% – 100% in 1% steps
  • Detectors:
    • PF: Low-noise, fast-response PIN photodiode with 730nm (± 15nm) bandpass filter
    • P700: Low-noise, fast-response PIN photodiode with an optical bandpass filter.

M-PEA-2 Optical Sensor Unit

  • Illumination: Sources as in M-PEA-1 sensor unit
  • Detectors: As M-PEA-1 but with additional detectors:
    • Delayed fluorescence: High-sensitivity wideband avalanche photodiode with 7 30nm (± 15nm) bandpass filter
    • Leaf absorptivity: Low-noise, fast-response PIN photodiode