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Instrument: LI-COR LI-840 Gas Analyzer

Acronym: LI-840

External Identifier: skos:exactMatch: https://vocab.nerc.ac.uk/collection/L22/current/TOOL0915/

Description

The LI-COR LI-840 is an absolute, non-dispersive infrared gas analyzer based on a single path, dual wavelength, and thermostatically controlled infrared detection system. It has an operating temperature range of -20 to +40 degrees Celsius. CO2 is measured in the range 0-3,000 ppm with an accuracy of better than 1.5 percent of the reading. H2O is measured in the range 0-80 ppt with an accuracy of better than 1.5 percent of reading.

Datasets (5)

Dataset Name	PI-Supplied Description	PI-Supplied Name
Surface underway pCO2 from NOAA Ship Ronald H. Brown cruise RB-08-02 in the Southwest Atlantic sector of the Southern Ocean near South Georgia Island in 2008 (SO_GasEx project)	Wet equilibrator effluent was delivered to a custom pCO2 analyzer unit centered on a LICOR LI840 NDIR unit. The NDIR unit vented directly to the room atmosphere.	LICOR LI840 NDIR Gas Analyzer
1A: Partitioning of carbon as a function of pCO2 and temperature during growth of Thalassiosira weissflogii from UCSB Marine Science Institute Passow Lab from 2009 to 2010 (OA - Effects of High CO2 project)	Dissolved inorganic carbon (DIC) was measured on a non-dispersive infrared (NDIR) analyzer.	NDIR Gas Analyzer
2A: Partitioning of carbon as a function of pCO2 and temperature during growth of Dactyliosolen fragilissimus from U.C. Santa Barbara Marine Science Institute Passow Lab from 2009 to 2010 (OA - Effects of High CO2 project)	Dissolved inorganic carbon (DIC) was measured on a non-dispersive infrared (NDIR) analyzer.	NDIR Gas Analyzer
Underway shipboard flow-through data collected from continuously flowing uncontaminated seawater on several R/V Gulf Challenger cruises in Casco Bay, Gulf of Maine from 2008-2012	After drying, the sample was pumped to a non-dispersive infrared gas analyzer (Li-cor, LI-6262 or LI-840), which measured the molar fraction of carbon dioxide (xCO2) of the sample stream.	LI-COR LI-840
Water column data collected during Dataflow cruises in the lower York River Estuary, VA during intense summer algal blooms in 2020-21	The pCO2-Dataflow system is instrumented with a pCO2 analyzer (LI-COR LI-840), a multi-parameter datasonde (YSI 6600V2), Garmin global positioning system (GPS MAP 546S), and data acquisition system	LI-COR LI-840