LI-191R

Line Quantum Sensor

The LI-191R Line Quantum Sensor measures PAR integrated over its 1-meter length. It is used to measure sunlight under a plant canopy, where the light field is non-uniform. The LI-191R makes it easy to measure under-canopy light in many plots quickly and consistently. It measures light in units of Photosynthetic Photon Flux Density (PPFD), which is expressed as μmol s-1 m-2.

  • Improved water resistance for long-term outdoor deployment
  • Integrated measurements using a single detector prevents variance found in sensors that use multiple detectors
  • Selected by the National Ecological Observatory Network (NEON®) for integrated PAR measurements

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