IR-8400DOX Gas Analyzer

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  • Oxygen analyzer
  • Continuous emissions monitor (CEM)
  • High reliability and low maintenance
  • Explosion-proof enclosure
  • NEMA 7 certified
  • LCD display non-contact operation
  • Automatic calibration (optional)
  • Multiple sample stream monitoring (optional)

The Infrared Industries IR-8400DOX is a CEM oxygen analyzer, capable of monitoring oxygen in a sample stream for extended periods of time. The IR-8400DOX Digital Oxygen Analyzer uses a paramagnetic or other sensors, based on your requirements and ranges.

The IR-8400DOX can measure Oxygen (O2) from ppm levels to 100% concentrations, allowing you to target the oxygen concentration that best suits your application.

The IR-8400D analyzer is temperature and pressure compensated to achieve excellent long-term stability and negates the need for frequent calibrations. Built to withstand hostile temperature and weather environments, these analyzers come standard with an LCD display, an RS232 output, an analog output, and an isolated linear 4-20 mA current output.

Need a Customized Application?

Do you have a unique application that consists of a different range of gas not currently detected in the IR-8400DOX? We can build a tailor-made gas analyzer that detects the gas of your choice.

Contact us today

Features and Benefits

State-of-the-Art Electronics

The IR-8400DOX is made with state-of-the-art electronics, which are housed in an explosion-proof enclosure. The analyzer is ruggedly built to withstand a long life, insensitive to shock and vibration.


Compatibility is assured by using stainless steel, Teflon, Viton, and Kynar, and by selecting corrosion-resistant materials for seal and tubing components.


Controlled long-term stability and accuracy are maximized and resistance to harsh environments is minimized with the use of temperature-stabilized optical bench and electronics. An enhanced temperature controller system allows the IR-8400DOX to accurately measure down to single parts per million (ppm) increments and stabilize temperatures within half a degree.

Automatic Calibration

An operator can select dates and times that the IR-8400DOX will automatically perform its own routine calibrations and update itself without any operator assistance.


  • Continuous emissions monitoring
  • Combustion monitoring for boilers and furnaces
  • Monitoring atmospheres in heat treated and annealing
  • furnaces and process stream control
  • Landfill methane recovery
  • Iron and steel
  • Electric power
  • Oil and petrochemicals
  • Ceramics, pulp and paper, food, and textiles
  • Vapor recovery
  • Refinery gas
IR-8400DOX Dimensions & Side View
IR-8400DOX Dimensions & Side View
IR-8400DOX Gas Analyzer with IR-1150
Sampling Conditioner System
IR-8400DOX Gas Analyzer with IR-1150 Sampling Conditioner System


General Specifications
Performance Measurement Range Based on application
Accuracy Less than 1% of full scale (based on user specification)
Repeatability Less than 1% of full scale over 24 hours
Stability Dependent on user specifications
Output noise (RMS) Dependent on user specifications
Response time Dependent on user specifications
Warm-up time Dependent on user specifications
Temperature range Dependent on user specifications
Gas Sample Requirements
Flow rate 2 scfh (1 LPM) - recommended 4 scfh (2 LPM) - maximum
Moisture 0 - 99% non-condensing
Analog 0 to 100 mV standard
0 to 1V, 0 to 5V (optional)
4-20 mA (isolated)
Digital RS232 bi-directional
Alarms Zero signal fault indication
Gas Flow System
Connections Sample inlet - 1/4" compression fitting
Sample outlet - 3/8" or 1/4" compression fitting
Materials 316 SS, sapphire, Teflon, Viton, Kynar, Polypropylene (typical)
Standard gas Oxygen - 0 - 10,000 ppm
Power 90V - 260V AC maximum, 117 Vrms ±10%, 50 Hz - 60 Hz 12V, 24V, or 36V DC (optional)
Enclosure (W x L x D) 10.25" x 10.25" x 9" (26 cm x 26 cm x 22.86 cm) enclosure with display window and attached 3.5" x 2.5" junction box NEMA 7 (C: Group D, E Div 1, 2)
Weight 25 lbs. (11.35 kg)
Warranty One year standard; Extended warranty optionally available



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