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LI-6800 Portable Photosynthesis System

The LI-6800 Portable Photosynthesis System simultaneously measures photosynthetic gas exchange and chlorophyll a fluorescence over the same area in plants and aquatic samples, revealing additional insights into photobiology. Highly extendable, it is capable of measuring gas exchange from soil, insects, and many other sample types for countless experiments.

  • SKU : E473-LI-6800
  • Manufacturer: Li-Cor
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Answer questions with confidence

Built on a foundation of decades of experience in photosynthesis research technology, the LI-6800 Portable Photosynthesis System empowers you to focus on your research questions.

Focus on your data

Fluorometer, file, calibration, balanced flow, and other utilities ease and assist your data collection.

Design your experiments

Support for custom gas mixtures, auxiliary sensors, custom chambers, and extensive programming capabilities give you flexibility for extended applications.

Take it comfortably into the field

Ergonomic grips, a carrying harness for support and access to controls, tripods, and a monopod for the sensor head facilitate your field work.

LI-6800 features that safeguard the collection and quality of publishable data include:

  • startup icon
    Automated startup, system tests and real-time operating status information ensure that the instrument starts and performs in top form, allowing you to quickly address issues if they arise.
  • battery icon
    Long-lasting, hot-swappable batteries keep up with you on long days. Battery charge status and a low-battery warning on the display let you keep going without interruption until you complete your measurements.
  • touch screen icon
    A responsive touch screen with a powerful graphics processor helps you visualize and understand the instrument settings.
  • charts icon
    Charts of live and logged data show multiple parameters at once. You can auto-scale, zoom in, and rescale charts to let the data reveal its story.
  • data log icon
    Configurable data logging capabilities help you get the data you need for a robust, thorough analysis.
  • files icon
    Data are recorded as plain text and Microsoft® Excel® files with embedded equations so you can recompute datasets with altered parameters.
  • config tools icon
    Configuration management tools let you store, load, and share configurations for different protocols and researchers.


Aquatic photosynthesis

aquatic a-q curve

The 6800-18 Aquatic Chamber—with the LI-6800 Portable Photosynthesis System—measures steady-state carbon assimilation and chlorophyll a fluorescence from algal suspensions, coral, macro algae, sea grasses, and more.

Dynamic Assimilation™ Technique

dynamic assymilation technique a-q curve chart

The Dynamic Assimilation Technique, based on a reformulation of the traditional assimilation equation, allows you to take measurements when chamber conditions are not at steady state, so you can record faster CO2 response curves and survey measurements.