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Category: LI-192

LI-192 Underwater Quantum Sensor

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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Newly Designed Light Sensors Now Available!

Newly Designed Light Sensors Now Available!

Building on our 40 year legacy with light sensors, LI-COR Biosciences is pleased to announce redesigned sensors. The improved design features a water-shedding housing for weather resistance and a detachable sensor head that simplifies installation and removal of the sensor for recalibration.

Light-Sensor

Learn more about the exciting new design and features here.

How to Prevent Negative Readings with LI-COR Light Sensors

How to Prevent Negative Readings with LI-COR Light Sensors

This tech tip helps to prevent mistakes that result in negative readings. When getting negative readings from your light sensor, check your multiplier, the connection between your light sensor and recorder/data logger, or the cable connection.

1. Did you enter the standard multiplier with a negative sign?

The Calibration Multiplier is always a negative number, because the shield of the coaxial cable of the sensor carries the positive signal instead of the negative signal. If you reverse the sign…

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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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