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Quantum PAR/DLI Light Meter

PAR- or Quantum meter measures the total amount of light which can be used by plants for photosynthesis (= conversion of light energy to chemical energy).

This handheld quantum meter provides accurate PAR light readings from ANY light source: Full sun to full shade indoors or outdoors; artificial light sources, incl. LED, High Pressure Sodium, Metal Halide, Florescent, Halogen, etc.). DLI mode shows Daily Light Integral on the LCD.

PAR is more valuable than Lux or Foot-Candles as it measures only the light used by plants for photosynthesis. According to the light source, the calibration is selectable (electric / solar).

  • Provides accurate PAR light readings from ANY light source
  • Full sun to full shade indoors or outdoors.
  • Artificial light sources (LED, High-Pressure Sodium, Metal Halide, Fluorescent, Halogen…).
  • Three modes of operation:
  • Instant Spot Measurement mode for PAR light readings.
  • Scan mode for quickly averaging PAR over an area.
  • DLI mode shows Daily Light Integral on the LCD (no computer needed).
  • Integral mounting plate for: stand, stake, lanyard & hanger hole, and magnet mounts.
  • Small size allows light readings in tight spaces without needing an external sensor.
  • ¼-20 threaded hole for mounting on camera tripods & stands.
  • Includes sensor cover & soft carrying case

The meter comes with manual and guideline values for different plants.

Technical data:
  • Measuring range:
    - PAR Light: 0 – 6,500 μmol / s*m2, 400 to 700nm
    - DLI (Daily Light Integral): 0 – 560 moles m-2 day-1
  • Resolution: 1 μmol / s*m2
  • Accuracy: ±5% (each meter is calibrated to a NIST traceable light sensor on a broad-spectrum light source)
  • Azimuth Error: ±1% over 360°
  • Daily Light Integral (DLI): Calculated continuously from light readings every 3 minutes
  • Water Resistant: IP-65 rated for use in rain, irrigation, and condensing environments (do not submerge)
  • Operating Environment: 32-130°F(0-55°C) with 0-100% RH (condensation ok)
  • Battery: CR2032 3v lithium coin cell included (2-year battery life)
  • Response Data: (Red line is meter response; Black line is ideal response)
  • Size & Weight: 15 × 5 × 2 cm
  • Weight: 77g

Item-No.: 32800 – Quantum PAR/DLI Light Meter