New LI-830 CO2
and LI-850 CO2/H2O Analyzers

For continuous measurements

High-performance monitoring solutions that give accurate, stable readings. Easy-to-use software and minimal maintenance provide hassle-free measurements for a wide range of applications and system integration options.

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Easy operation

plugging in the LI-830

Just plug it in and you’re ready to go.

With the new optional pump and display, just power the instrument on, and measurements appear immediately. View real-time measurements, configure graphs, or set up logging options with the easy-to-use software.

Minimal maintenance interior picture

Keep it simple with minimal maintenance.

Ensure continuous operation and minimize downtime with a user-cleanable optical bench, and no need for factory recalibration.

software screenshot

Easily view or log measurements.

Windows® and Mac® interface software display real-time concentrations and graphs. Easily set up operational parameters and logging options, and view analyzer diagnostics.

Flexible to fit your needs

Multiple configuration options provide you the flexibility to select the analyzer that’s right for you, without compromise.

CO2 + H2O

Add water vapor measurements to the standard CO2 measurement (0-20,000 ppm) for expanded applications and increased measurement accuracy.

Internal Pump

An integrated pump provides a constant air flow rate. Or, choose a basic analyzer configuration and incorporate your own pump.

Analyzer Display

Add a display to view real-time gas concentrations, and pressure and temperature readings.

LI-850 outside and inside

Designed for your application

Flexible configurations and outputs for a variety of applications.

Growth Chambers and Greenhouses

Analyzers can be configured to monitor CO2/H2O and trigger fans or injection of CO2 and/or H2O, keeping levels within a desired range. User-supplied relays can also trigger devices such as pumps, valves, dialers, or audible alarms.

Atmospheric Monitoring

Analyzers have the stability and durability to continuously monitor atmospheric CO2 and H2O. The included software facilitates configuration, control, data collection, and graphical data display.

Other common applications include:

  • Measuring pCO2 and DIC
  • Indoor air quality monitoring
  • Building system efficiency (ventilation systems)
  • Process control
  • Bioremediation
  • Atmospheric profiling
  • Leakage monitoring
  • TOC analysis systems
  • Volcanology

Advanced technology for excellent performance

Optical Bench

air flow animation


Careful design of thermostatically controlled IR detection system gives you excellent stability.


Integrated thermistors and a pressure transducer provide high accuracy for the concentration calculation over the entire measurement range.

Reduced variability

A pressure transducer within the gas flow path compensates, and corrects for, changes in barometric pressure.


A foam enclosure surrounding the optical path maintains a controlled thermal environment and protects the bench from mechanical shock and vibration.

Output what’s right for you

  • Analog and digital outputs
    • Two current (4-20 mA) and two voltage (0-2.5V or 0-5V)
    • Digital TTL (0-5V) or Open Collector
  • XML communications
  • Windows and Mac software, via USB or RS-232

The analyzer you trust – now even better, at a lower cost

We’ve improved upon our proven platform, to bring you better analyzers with the performance and reliability you’ve come to trust.

In addition to expanded configuration options, the new LI-830 CO2 and LI-850 CO2/H2O Analyzers also feature a longer lasting source - further minimizing any field maintenance needed, with lower power requirements.

LI-830 and LI-850 product photos