Advantages of the LI-840A

The LI‑840A CO₂/H₂O Analyzer is a low maintenance, economical gas analyzer designed for continuous monitoring applications. It is an absolute, non-dispersive infrared (NDIR) gas analyzer based upon a single path, dual wavelength infrared detection system. It can be used in a wide range of demanding environmental conditions.

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Key Features:

• Wide Measurement Range: 0-20,000 ppm for CO₂, 0-60 mmol/mol For H₂O.
• Wide Operating Temperature: -20° to +45°C
• Low Power: Less than 4W after power up
• Low Noise: Less than 1 ppm @ 370 ppm for CO₂, less than 0.01 mmol/mol at 10 mmol/mol for H₂O with 1 second signal averaging.
• Real Time Corrected Readings: On board sensors measure and correct for changes in cell temperature and pressure. CO₂ concentrations are corrected for band broadening due to water vapor.
• User Cleanable Optics: The optical bench can be easily cleaned by the user; which reduces down-time due to contamination, and eliminates the need for factory recalibration.