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Quality Instrumentation for the Life Sciences

WMA-5 CO2 Gas Analyzer

The WMA-5 is our 5th generation CO2 gas analyzer designed for applications that demand a high degree of accuracy and control with minimal maintenance.

The design of the WMA-5 ensures inherent calibration stability that has been confirmed by over 35 years of experience in gas analysis technology. It features a non-dispersive, infrared measurement technique coupled with microprocessor-based signal processing resulting in precise measurement of CO2. Our innovative “Auto-Zero” technology and insulated, thermostatically controlled optical bench ensure fast warm-up, long-term stability, accuracy, and analyzer calibration. It also minimizes the effects of sample cell contamination, IR source aging, changes in detector sensitivity, and pre-amplifier gain.

The WMA-5 can be supplied with two different optical benches calibrated specifically to the range required. One bench is optimized for measurement ranges of CO2 up to 30000 ppm and another for ranges above 30000 up to 100000 ppm. For users that want to recalibrate the gas analyzer to a new level, this can easily be achieved as long as it is within the range for that particular optical bench.

Interested in WiFi?

Set up and monitor the WMA-5 remotely from your computer or smartphone browser in real-time with our WiFi option.

WMA-5 WiFi

GAS Software

GAS (Gas Analysis Software) is available for use with the WMA-5 for monitoring, logging, and recording environmental sensor data.

GAS Software

Main Display for CO2

Main Measurement Screen

Monitor CO2 Trends

EGM-5 Graphic Display

Monitor All Sensors

Multiple Sensors


  • Plant growth chambers
  • Environmental control rooms
  • Open top chambers (OTCs)
  • Greenhouses and nurseries
  • Incubators
  • Fruit storage
  • FACE sites
  • Breweries
  • Ambient air monitoring
  • CO2 leakage monitoring
  • Indoor air quality and safety
  • Industrial monitoring

Product Features

  • High precision, compact, non-dispersive infrared gas analyzer for CO2
  • Accuracy: <1 % of span concentration over calibrated range
  • CO2 ranges up to 100000 ppm (10%)
  • Automatic pressure and temperature compensation
  • Numeric and graphical display of data
  • Convenient data storage and transfer using USB flash drive
  • Operation from AC and DC power inputs
  • Large touch display with excellent readability
  • Built-in sampling pump and electronic flow sensor
  • Voltage, current and digital output
  • External water trap
  • High resolution electronic paper touch display
  • Visual and audible alarm/warnings (high and low CO2)
  • Rugged IP65 enclosure
  • Optional H2O sensor (Solid state)
  • Optional O2 sensor (Electrochemical cell)
  • Optional WiFi

Partial list of U.S. customers utilizing the WMA-5:

  • Colorado State University
  • Cornell University
  • Kansas State University
  • Michigan State University
  • Ohio State University
  • U.S. Department of Agriculture-ARS
  • U.S. Geological Survey
  • University of California
  • University of Illinois
  • University of Minnesota
  • University of South Carolina
  • University of Washington
  • University of Wisconsin