Note about instrument software versions: We are currently maintaining four versions of OPEN instrument software (3.x, 4.x, 5.x, and 6.x); one for each of the four possible hardware configurations that LI-6400s/LI-6400XTs might have. The software available for download on this page is the latest available for the versions 3 through 6.
Compatibility: OPEN 6.1 can only be installed on instruments with the 400 MHz (XT) or 200 MHz boards.
Download version 6.1.3 here. 3/12/09 40.2M
Compatibility: Download this software to update instruments already running version 5.x software.
Download version 5.3 here. 6/24/05 4.6M
A patch program for Version 5.3 is available, which fixes two known bugs. This patch program requires that Version 5.3 be installed.
Patch program:
Download version 5.3.2 here. 11/30/05 0.6M
Compatibility: Download this software to update instruments already running version 4.x software.
Download version 4.06 here. 6/24/05 0.9M
Compatibility: Download this software to update instruments already running version 3.x software.
Download version 3.4.3 here. 7/9/04 0.9M
The file exchange software below is used to download data from the LI-6400 to your computer. The simulator/ control software allows you to simulate the LI-6400 software on your computer to recompute data files, etc. It can also be used to control the LI-6400 remotely.
Installer for LI6400SIM, LI6400XTerm, and LI6400FileE.x. Download version 6.1.2 here. 12/18/08 7.0M
Photosynthesis.exe 10/24/07 0.9M
This software eases response curve parameter calculation, improving interpretation and statistical comparison. It uses your response curve data to calculate compensation and saturation points, as well as efficiencies. It is useful for research and teaching applications to model the response curve impacts of parameter changes. In addition, the software will:
Download version 1.3 here. 4/28/09 0.6M
For use with the 6400-89 Insect Respiration Kit, this software installs a configuration file
onto your instrument that, when selected, adds the Respiration Rate to the New Measurements screen to display insect respiration in units of µg CO2/g Insect/min.
Open Source software available here.