CO2 & H2O Gas Analyzers: For users that demand accuracy and stability for high level research

CIRAS-SC The CIRAS-SC is a single channel infrared gas analyzer for accurate, absolute measurement of CO2 and H2O in µmol mol-1 of a single gas stream. Applications Plant/Crop physiology Atmosphere & pollution CO2 monitoring CO2 enrichment studies Animal/insect physiology Industrial process control

CIRAS-DC The CIRAS-DC is a dual channel, true differential infrared gas analyzer featuring 4 independent gas analyzers (2 for CO2 and 2 for H2O).  The CIRAS-DC is capable of accurate, absolute measurement of CO2 and H2O in µmol mol-1 of two gas streams and displays the results as the absolute concentration of one gas stream (the reference) and the difference between the two gas streams.  As such it is capable of resolving small differences between two gas streams in real time. This type of instrument (true differential analyzer) is the preferred option for plant photosynthesis and respiration measurements where differential concentrations need to be resolved to a high degree of accuracy and precision.

CIRAS-SC Data Sheet

CIRAS-DC Data Sheet

Our CIRAS-SC and CIRAS-DC laboratory gas analyzers feature a high technical specification and quality workmanship ensuring accuracy, precision and reliability.  They are both designed to be operated through a standard PC, with integral logging for stand-alone operation.  Having said that, an optional 12V lead acid battery can be supplied for both instruments for portable applications if required.

Common Features

• High precision, non-dispersive infrared gas analyzers for CO2 and H2O
• CO2 Range: 0-2,000 ppm (up to 9,999 ppm)
• Fast response
• Analog & digital (RS232) linear output
• Excellent stability achieved by built-in Auto-Zero facility
• Fully compensated for changes in temperature, pressure and gas interactions
• Built-in sampling pump with mass flow controllers
• Insensitive to vibration, no moving parts ensuring high reliability
• Integral datalogger with 5 analog and 2 thermistor inputs

CO2/H2O Infrared Gas Analysis

The CIRAS is a true differential system. It features 4 independent, non-dispersive gas analyzers for accurate, simultaneous measurement of both CO2 and H2O eliminating the problems associated with "gas switching" systems. There are no moving parts. The analyzers (reference and analysis) include an infrared source, gold plated and highly polished sample cells and detectors. The analyzers act as absorptiometers measuring only in the 4.26 µm (CO2) and 2.60 µm (H2O) wavebands ensuring accurate, rapid and stable results.
 

For measurements at elevated CO2 concentrations, the CIRAS is factory calibrated up to 9,999 µmol mol^-1 as standard.

Advanced Analyzer Auto-Zero

The CIRAS features an "Auto-Zero" facility which ensures long term stability and accuracy of the analyzers. It automatically corrects for sample cell contamination, dirty optics and drift in electronics.

Unique, Built-In Self-Calibration System

Our innovative system design features a built-in "Self-Calibration" feature allowing for simple, accurate calibration of the CO2 analyzers. This is very useful for researchers studying from remote sites. An H2O calibrator is supplied with each system as standard.

Temperature Stability

The analyzers are thermostatted and completely insulated to ensure accurate measurements under changing ambient temperatures.  This eliminates problems associated with software corrections.

CO2 & H2O Calibration

Our history and expertise in CO2 & H2O infrared Gas analysis design speaks for itself. The design of the CIRAS ensures an inherent calibration stability. This has been confirmed by over 15 years experience of the technology. The CIRAS system does not require calibration. To ensure proper operation and calibration of the analyzers, we do recommend periodic checks to confirm system integrity.