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Category: Light Measurement

photosynthesis-eclipse
Solar Eclipse Data from LI-COR

Solar Eclipse Data from LI-COR

On Monday, the LI-COR campus was in the path of totality for the August 21, 2017 solar eclipse. Here are data collected during the eclipse at our campus in Lincoln, Nebraska, USA. Even though cloud cover obscured our direct view of the eclipse, there were observable differences in light intensity, photosynthesis measurements, and environmental flux during totality.

The partial eclipse began around 11:37 AM CST, with totality happening from 1:02 PM to 1:04 PM. The eclipse was over by 2:37…

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Battery Tabs on the LI-250A Light Meter

Battery Tabs on the LI-250A Light Meter

Occasionally the LI-250A Battery tabs can become depressed against the sides of the battery compartment.  When this occurs, the battery may make intermittent contact with the tab, especially if it experiences a fall or hard landing.   The temporary loss of power due to intermittent contact with the battery tabs may then cause the processor to lock up and the instrument will cease working altogether.

To resolve battery tab problems, gently bend the battery tabs (below) until the nine-volt battery fits…

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Light 1
It’s Pyranometer Calibration Season

It’s Pyranometer Calibration Season

LI-COR encourages our customers to return their LI-200/R Pyranometer Sensors for recalibration (suggested every 2 years after field deployment) between the months of March and September. Why? Because pyranometer sensors need to be calibrated outdoors in natural sunlight in order to construct an accurate relationship between the output of each sensor and incoming solar radiation. During LI-COR’s 40+ years of manufacturing and calibrating pyranometers, we have found that best results are obtained during the summer months when sensors can be…

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LI-200R Pyranometer Performs Well in NREL Solar Radiation Assessment Tests

LI-200R Pyranometer Performs Well in NREL Solar Radiation Assessment Tests

Prior to the official product launch, LI-COR provided the National Renewable Energy Laboratory (NREL) with a set of LI-200R Pyranometers for their long-term solar radiation measurement project. The LI-200R is based on the proven LI-200 Pyranometer, but with a more robust cable and an improved seal against water vapor. The sensor is also detachable from the base/cable, simplifying installation and removal. Click here for a detailed comparison between the old and new sensor designs. 

NREL is a US government…

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Light-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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