LI-8100A Automated Soil CO₂ Flux System

The LI-8100A Automated Soil CO₂ Flux System provides researchers sophisticated flux monitoring instrumentation in a dedicated system that is modular and easy to use.

Designed to minimize changes to the soil and environment that can affect the natural soil CO₂ production and diffusion processes.
New patent-pending pressure vent design minimizes pressure pulses at chamber closing and allows pressure inside the chamber to track the ambient pressure even under windy conditions.
Both survey and long-term chambers close automatically, eliminating variations caused by manual chamber placement.
CO₂ flux is calculated at the CO₂ concentration of the surrounding ambient air. This minimizes effects resulting from the necessary increase in chamber CO₂ concentration during a measurement.
Chamber geometry facilitates mixing without using fans, thus eliminating potential for chamber pressure perturbation.
Data analysis software is a powerful tool for viewing and quality control of data.
Measure in high CO₂ environments up to 20'000 ppm.
Wireless communications and LAN connectivity enabled.

Survey Chambers

The pneumatic bellows system raises the chamber between repetitions to allow for equilibration with ambient CO₂ and H₂O concentrations, before gently lowering again to perform another repetition. As a result, erroneous flux rates, induced by mechanical soil disturbance, are greatly reduced.

8100-102 Survey Chamber

10 cm diameter chamber.

8100-103 Survey Chamber

20 cm diameter chamber.

LI-8150 Multiplexer

The LI-8150 Multiplexer greatly expands the capability of the LI-8100A and provides a simple solution that satisfies both temporal and spatial resolution requirements for monitoring CO₂ flux.

Connect up to 16 Long-Term Chambers
30 m diameter coverage
Easy connection to the LI-8100A Control Unit
Single gas analyzer in the LI-8100A prevents measurement bias
Conduct vertical atmospheric CO₂ profile measurements

Long-Term Chambers

Long-term chambers to make unattended measurements of diel and seasonal soil CO₂ flux patterns. These chambers attach to either the LI-8100A (direct connection), or to the LI-8150 Multiplexer.