The 6800-18 Aquatic Chamber is used to measure steady-state carbon assimilation and chlorophyll a fluorescence from an algal suspension using the LI-6800 Portable Photosynthesis System, the preferred photosynthesis system for terrestrial plant research.
The Clear-top Leaf Chamber (6800-12A) has a durable, transparent top for ambient-lighted CO2 and H2O flux measurements. The optional Small Light Source attaches directly to this chamber. Several options for measurable leaf area are available with aperture inserts. To fill the chamber area—and easily calculate leaf area size—swap in one of three interchangeable apertures for different leaf area apertures: 3×3 cm, 2×3 cm, and 1×3 cm.
Leaf temperature is measured by a high-precision thermocouple mounted in the chamber, while a Gallium Arsenide Phosphide (GaAsP) photodiode measures photosynthetically active radiation (PAR) inside the chamber. Plated surfaces minimize H2O adsorption. Durable gaskets form a seal around irregular leaf surfaces.
Large Leaf and Needle Chamber
The Large Leaf and Needle Chamber (6800-13) is ideal for leaves and needles that are big enough to cover most or all of the 36-cm2 area leaf aperture. This large surface area gives you unparalleled flexibility to measure different leaf shapes and sizes. The large leaf aperture also improves the accuracy of all measurements. The higher signal-to-noise ratios are especially helpful for seeing differences in low-flux measurements, such as measurements of dark respiration. The high flow rates of the LI-6800—not found in any other photosynthesis system—make measurements over such a large leaf area possible.
The Large Leaf and Needle Chamber has a durable, transparent top for ambient-lighted CO2 and H2O flux measurements. The optional Large Light Source attaches directly to this chamber for controlled lighting with any combination of red, green, blue, and white light. The large 6×6-cm leaf area features two high-precision thermocouples for more accurate temperature data.
Small Plant Chamber
The Small Plant Chamber (6800-17) enables the measurements of whole Arabidopsis thaliana plants, other small rosettes, or short canopies such as turf in 65 mm (2.5 inch) pots or 38 mm (1.5 inch) Cone-tainers™. The Small Plant Chamber features a transparent Propafilm™ for measurements under ambient light. It is compatible with the Large Light Source, which enables measurements under controlled lighting with any combination of red, green, blue, and white light.
The Bryophyte Chamber (6800-24) is used to measure CO2 and H2O gas exchange from mosses, hornworts, liverworts, and lichens. The chamber holds loose material in a shallow well during the measurement. It features a clear Propafilm™ top for measurements under ambient lighting conditions. It is compatible with the Large Light Source for measurements under controlled lighting with any combination of red, green, blue, and white light.
Soil CO2 Flux Chamber
The Soil CO2 Flux Chamber (6800-09) is used to measure the rate of diffusion of CO2 from the soil surface. This chamber uses technology from the patented LI-COR soil solution, which is the global standard in soil chamber technology. The 20 cm Soil CO2 Flux Chamber lets you quickly make measurements, and is ideal for assessing spatial variability of CO2 flux over a study site. Data output can be formatted for SoilFluxPro™ Software for post-processing data analysis. With SoilFluxPro software you can easily view, graph, edit, and recompute soil gas flux data. The 6800-09 also comes with a soil temperature/moisture sensor.
Custom Chamber Adapter
The Custom Chamber Adapter (6800-19) allows you to construct a chamber to meet your needs. The custom chamber kit includes the adapter and hardware, tube connectors, type ‘E’ thermocouple adapter cable, and a template to provide guidance for mounting the custom chamber to the sensor head.
Insect Respiration Chamber
The Insect Respiration Chamber (6800-89) provides the ability to measure CO2 respiration from insects, other very small animals, or small fruits. The LI-6800 directs conditioned air through the insect respiration chamber and computes a flux based on the differential concentrations between reference and sample gas analyzers. Respiration is computed on the basis of mass, providing a measure of CO2 exchange per unit of mass over time. The Insect Respiration Chamber includes the Custom Chamber Adapter.