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LI-6800 Portable Photosynthesis System

The LI-6800 is an entirely new instrument for measuring photosynthetic gas exchange and chlorophyll fluorescence from plants.

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The LI-6800 puts you first

Fast control loops

When you change the leaf chamber environment—light, temperature, CO2, or H2O—the instrument adjusts to the new setpoint right away. 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 leaf temperature control. It can control temperature at a setpoint, track the ambient temperature, or ramp the temperature 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.

low CO2 concentrations and 1 ppm step changes

Supports low CO2 concentrations and 1-ppm step changes to find the CO2 compensation point in C4 plants without customization.

Gas input port

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.

The LI-6800 keeps up with you

The LI-6800 is capable of completing a survey measurement in less than one minute, with batteries that can last all day. It achieves an ideal balance of light weight and high performance. User cleanable optics and simple maintenance procedures minimize down time and ensure low maintenance costs.

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

The LI-6800 makes discovery more fun

Featuring a large touchscreen display that shows more informative, full color plots that help you track the progress of each measurement. On-screen messages alert you to issues with the measurement and control ranges so you can collect consistent, high quality data. It teaches you how to make better measurements with color graphics and instant feedback.

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.


See the LI-6800 Portable Photosynthesis System in action.

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The best performance

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