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New Sensors Set the Standard for Light Measurements

New Sensors Set the Standard for Light Measurements

LI-200RLINCOLN, Neb., June 18, 2015 /PRNewswire/ — For more than 40 years LI-COR light sensors have been the industry standard for light measurement. Building on this proven experience LI-COR is introducing a redesigned pyranometer, quantum sensor, photometric sensor, and line quantum sensor, all providing improved high-speed measurements with microsecond response times.

LI-COR sensors are proven performers designed for continuous monitoring in…

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Measuring PPFD and PPFFR with LI-COR Underwater Radiation Sensors

Measuring PPFD and PPFFR with LI-COR Underwater Radiation Sensors

Phytoplankton, algae, and aquatic plants use photosynthetically active radiation (PAR) with wavelengths between 400 and 700 nanometers for photosynthesis.  This radiation comes from the sun and its intensity is characterized as Photosynthetic Photon Flux Density (PPFD) in units of micromoles of photons per square meter per second (µmol/m2/s).  These organisms are also illuminated by reflections from the bottom surface and particles suspended in the water.  The total number of photons incident on a point from all directions is called Photosynthetic…

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Daily Light Integral (DLI) measurement using LI-COR Light Sensors

Daily Light Integral (DLI) measurement using LI-COR Light Sensors

Definition of DLI

The daily light integral (DLI) is a measure of the amount of light received in a single day in a particular area. For example, the number of moles of Photosynthetically Active Radiation (PAR) photons received during a single day in a square meter, or: mol m-2 d-1. Another example is  the total solar radiation received during a single day in a square meter, or: W m-2. Depending on the application or research question the time integral of…

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Turn Ons and Turn Offs

Turn Ons and Turn Offs

The LI-1400 Datalogger is often used for collecting environmental data using a variety of LI-COR Biosciences sensors. These include the LI-190 Quantum Sensor, the LI-192 Underwater Quantum Sensor, the LI-193 Spherical Quantum Sensor, and the LI-200 Pyranometer, among others. You can either program their LI-1400 to collect data automatically or set it up to collect data manually.

The LI-1400 has a power-saving mode to help conserve the batteries by…

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