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LI-6800 Portable Photosynthesis System

The only instrument in the world that uses Rapid Sensing™ Technology for fast A-Ci curves and survey measurements.

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6800-01 Multiphase Flash Fluorometer

Fast response creates new research possibilities

Fast control loops

When you change the leaf chamber environment—light, temperature, CO2, or H2O—the instrument adjusts to the new setpoint right away thanks to Rapid Sensing™ Technology. The fast adjustment saves time and enables you to measure a plant’s response to rapidly changing conditions.

H2O control

Providing full control over water vapor, the LI-6800 can maintain humidity at any level below condensing conditions in the leaf chamber and gas analyzers.

Rapid temperature control

Capable of achieving 10°C below and above ambient temperature, the LI-6800 provides fast and precise temperature control. It can control temperature at a setpoint, track the ambient temperature, or ramp the temperature up or down according to your experimental requirements.

High flow rates

User-adjustable flow rates—from 0 to 2.5 liters per minute—minimize response times and expand the system versatility.

precise contgrol allows for faster measurements

The precise control of CO2 allows for faster measurements, so you can perform rapid A-Ci response curves with the Rapid A-Ci Response (RACiR™) Method.

Gas input port

A gas input port enables you to subject the leaf to custom gas blends.

actual leaf temperature

A unique, durable fine-wire thermocouple maintains direct contact with the leaf—to get the actual leaf temperature with every measurement.

Leaf area

To fill the chamber area—and easily calculate leaf area—swap in one of several interchangeable inserts for different leaf area apertures on the Clear-top chamber and on the Multiphase Flash fluorometer.

Thank you for your request.

You will receive an email shortly.

If you do not receive it within 24 hours or if you have any questions, please contact LI-COR at 1-402-467-3576.

Fill out the form to enter to win a 120-day trial of the LI-6800.


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The latest advancements
in photosynthesis

A paper with the LI-6800 Portable Photosynthesis System has just been published in Plant and Cell Physiology. This publication explores how the color of actinic light affects the estimate of the electron transport rate (ETR) when calculated from fluorescence measurements.

View the abstract

New options for leaf area let you fill the leaf chamber area—and avoid calculating leaf area—with interchangeable apertures. For bigger leaves, the new Large Leaf and Needle chamber has a 6x6 cm leaf area aperture.

See your options for leaf area

The RACiR™ Method was recently published in Plant, Cell & Environment as a fast way to measure CO2 response.

Read the open access paper
6800-01 Multiphase Flash Fluorometer

The LI-6800 gives you a new experience

The LI-6800 can complete a survey measurement in under a minute, with batteries that last all day. A large touchscreen display shows informative, full color plots that help you track the progress of each measurement. On-screen messages alert you to issues so you can collect consistent, high quality data.

The LI-6800 is fast and dependable. It is ready to collect incredible data wherever your research takes you.

last years winner

Win the use of the LI-6800 for a field season

“The LI‑6400 is a great machine, but all the little tweaks you made to the LI‑6800 improved the usability of it. The speed is great.”

– Randy Long, last year's winner

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How it's Different

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