LI-6800 Portable Photosynthesis System

Simultaneously measure photosynthetic gas exchange and chlorophyll a fluorescence with the LI-6800 Portable Photosynthesis System.

As the most cited photosynthesis instruments in published literature, the LI-6800 and its predecessors continue to deliver results that your colleagues worldwide trust for clear insights and publication-ready data.

Introducing the

LI-6878 Leaf Trace Gas Integration System

Explore new frontiers with real-time leaf-level carbon isotope discrimination, and CH₄ and N₂O flux measurements.

Deeper Insights into Your Plants

Measuring gas exchange and fluorescence together shows not just how much photosynthesis is happening, but why—revealing how plants respond to stress, light, nutrients, or treatments in real time. This gives you a clearer way to quantify how factors like fertilizers, the environment, or genetics are impacting plant performance.

The LI-6800 also enables more detailed analyses, such as CO₂ response (A-Ci) curves. While a single measurement shows a leaf in its current physiological state, A-Ci curves go further—allowing the estimation of parameters related to a plant's intrinsic physiological capacities.

This means you can build a more complete picture of what's happening at the leaf and gain a stronger, more mechanistic understanding of plant physiology.

Real-Time Responses You Can Trust

The LI-6800's small-volume infrared gas analyzers (IRGAs) are located in the sensor head, so the system can respond quickly as conditions change—and maintain stable environmental control.

Faster Detection

Collect data on stomatal conductance, CO₂ assimilation, and photosystem II quantum efficiency

More Precise Control

Maintain stable chamber conditions with responsive feedback

Quicker CO₂ Response Curves

Use the Dynamic Assimilation™ Technique to generate response curves in less time

Designed for Publication-Ready Data

The LI-6800 lets you focus on the quality of your measurements, not the mechanics of collecting them. From survey measurements to A-Ci curves, the LI-6800 is designed to help you collect data that you can trust, defend, and publish.

Key Features:

Precise environmental control for CO₂, H₂O, temperature, and light
Long-lasting, hot-swappable batteries for uninterrupted measurements
Responsive touch screen, live operating statuses, and automated system tests
Live data charts, shareable configurations, and configurable logging
Plain-text and Excel-compatible data outputs for transparent post-processing

A Platform that Grows with You

Go beyond a single chamber system. Use different chambers and light sources to accommodate leaves of nearly any shape and size, or other applications including:

Small and large leaves
Needles, shoots, and sprigs
Algae and aquatic organisms
Soil CO₂ fluxes
Bryophytes
Insects
Custom applications

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Backed by LI-COR Scientists

Every LI-6800 comes with access to the very people who created it, build it, and use it—and know it best. LI-COR's team of dedicated scientists and experts are here to answer questions, solve problems, and help you move forward with confidence.

A Closer Look

Learn how to design better experiments and interpret photosynthesis data with confidence in A Hitchhiker's Guide to Leaf-Level Gas Exchange—your guide to turning complex measurements into meaningful results.

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