John Morris Scientific introduces LI-COR’s LI-7500A high speed, high precision open path CO2 /H2O infrared gas analysers designed to operate in harsh environments especially in remote locations.
Designed to accurately measure absolute densities of carbon dioxide and water vapour in turbulent air, the LI-7500A open path CO2 /H2O infrared gas analysers feature a sealed sensor head with sapphire optical windows allowing operation in harsh environments at temperatures ranging from -25ºC to +50ºC.
In the eddy covariance method, these measurements are used in conjunction with sonic anemometer data to determine fluxes of CO2 and H2O from agricultural or natural landscapes such as forests, grasslands, deserts and oceans for global change and ecological studies.
The open path measurement of LI-7500A infrared gas analyzers eliminates the need for a pump, reducing the overall power requirement of the flux system. This is especially important in remote locations where electrical power supply may be limited.
The open path gas analysers also eliminate time delays, pressure drops and sorption/desorption of water vapour on tubing employed with closed path analysers.