Chambers for Conifers
The 6400-02B LED source is designed with red and blue LEDs (665 and 470 nm, respectively) to provide uniform intensities up to full sunlight (~2,000 µmol m-2 s-1) over an area of 6 cm2. Mounting simply requires replacement of the upper half of the standard leaf chamber. Powered from the LI-6400XT console, the 02B allows the light intensity to be automatically controlled, which is especially critical for response curve measurements.
6400-05 Conifer Chamber
The conifer chamber is constructed of acrylic for durability and lined to minimize water sorption. Long shoots (5 cm) with needles up to 3.5 cm long can be accommodated in the chamber. The 6400-05 mounts directly to the sample cell of the system's CO2 and H2O IRGAs.
6400-07 Needle Chamber
The 6400-07 has a 2 x 6 cm aperture and is specially designed to accommodate long-needled conifers. The chamber has foam mounting pads that hold up to five needles in the chamber. The chamber top and bottom have replaceable clear Propafilm® windows for excellent light transmittance. A quantum sensor in the chamber measures light intensity at the plane of the needles.
The 6400-22L Package combines the 6400-22 Opaque Conifer Chamber and the 6400-18A RGB Light Source, which are also available separately. The 6400-22 is constructed of an opaque material that has excellent resistance to water sorption. 7.5 cm long shoots with needles up to 3.5 cm long can be accommodated in the chamber, which mounts directly to the sample cell of the system's CO2 and H2O IRGAs. The 6400-18A RGB Light Source enables users to control the red, green, and blue light intensity for measurements of short-needled conifers in the field.
6400-40 Leaf Chamber Fluorometer
The 6400-40 Leaf Chamber Fluorometer enables the simultaneous measurement of chlorophyll fluorescence and gas exchange over the same leaf area. The 6400-40 is designed with a uniform, integrated LED light source and PAM fluorometer that easily attaches to the LI-6400XT sensor head, giving the user complete control of the environment surrounding the 2 cm2 leaf area. Measurements of combined gas exchange and fluorescence expand the LI-6400XT's usefulness in assessing a plant's response to stress (read more).