The Li-6400XT (LI-COR Biosciences UK Ltd, www.licor.com) allows automatic measurements of the CO2 and water vapour concentrations in leaf and needles as well as chlorophyll fluorescence. The Li-COR 6400XT has two absolute and non-dispersive infrared analyzers allowing precise real-time measurements.

The infrared radiation passes into the leaf chamber and is twice reflected by mirrors to enhance the signal and to improve the signal-to-noise ratio. Then the infrared beam passes through the filters, that are highly specific for CO₂ and H₂O. The CO₂ and H₂O concentrations are continuously measured at both reference and sample compartments. The CO₂ concentration in the incoming stream can be set up and controlled within 1 ppm resolution between 50 to 2000 μmol^-1. The LI6400XT controls the chamber humidity by automatically varying the flow rate. Gas exchange measuring system was used in the following research papers: Wang J. et al, Front Plant Sci. 2016; 7: 250,  

Location: room B3-38-51