- Model LI-190R - Quantum Sensor

During photosynthesis, plants use energy in the region of the electromagnetic spectrum from 400-700 nm. The radiation in this range, referred to as Photosynthetically Active Radiation (PAR), can be measured in energy units (watts m-2) or as Photosynthetic Photon Flux Density (PPFD), which has units of quanta (photons) per unit time per unit surface area. The units most commonly used are micromoles of quanta per second per square meter (┬Ámol s-1 m-2). Plant scientists, horticulturists, ecologists, and other environmental scientists use the LI-190R Quantum Sensor to accurately measure this variable.

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