IR-8400D Dual Stream Gas Analyzer

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  • High reliability and low maintenance
  • Explosion-proof enclosure
  • NEMA 7 certified
  • LCD display non-contact operation
  • Measures up to four gases simultaneously

The Infrared Industries IR-8400D Dual Stream Digital Gas Analyzer is a Non-Dispersive Infrared (NDIR) gas analyzer, capable of simultaneously monitoring up to four target gases in a sample stream for extended periods of time. The IR-8400D is designed specifically for the measurement of Hydrocarbons (HC), Carbon Dioxide (CO2), Carbon Monoxide (CO), and Oxygen (O2). The ranges for the IR-8400D Dual Stream are specified by end-user requirements.

Tailored for the petroleum industry, this instrument is designed specifically for enhanced oil recovery applications as well as for refineries and petroleum transfer stations. For example, it can be configured to monitor the level of CO2 present in the separated gas from production wells using CO2 injection for enhanced oil recovery. The IR-8400D Dual Stream is designed to continuously monitor total hydrocarbons expressed as CH4, C3H8, or C4H10 in process gas streams or for ambient air.

Need a Customized Application?

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

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The IR-8400D Dual Stream Gas 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 a LCD display, RS232 output, analog output, and an isolated linear 4-20 mA current output.

Features and Benefits


The IR-8400D Dual Stream is made with state-of-the-art electronics which is housed in an explosion-proof enclosure. The analyzer is ruggedly built for long life and a high tolerance to shock and vibration.


Compatibility is assured by using corrosion-resistant materials such as stainless steel sample cells and sapphire windows and by selecting specialized materials for seal and tubing components.


The IR-8400D Dual Stream is temperature controlled and compensated for long-term stability and accuracy. Maximized performance and a high resistance to harsh environments are maintained with the use of a temperature-stabilized optical bench and electronics.

Automatic Calibration

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


  • Continuous emissions monitoring
  • Process monitoring
  • Combustion monitoring for boilers and furnaces
  • Monitoring atmospheres in heat-treated and annealing furnaces and process stream control
IR-8400D Dimensions & Side View
IR-8400D Dimensions & Side View
IR-8400D Gas Analyzer with IR-1150
Sampling Conditioner System
IR-8400D Gas Analyzer with IR-1150 Sampling Conditioner System


General Specifications
Performance measurement range 0 - 100% as specified by customer
Accuracy ± 2% of reading or ± 5% full scale
Repeatability ± 1% of reading or ± 5% full scale
Stability - 24-hour period ± 0.5% full scale zero drift (maximum)
± 1% full scale span drift (maximum)
Stability - 90-day period ± 1% full scale zero drift (typical)
± 2% full scale span drift (typical)
Output noise (RMS) Less than 0.5% full scale
Response time Less than 10 seconds (electronic)
Warm-up time Less than 1 hour
Temperature range -40° F to 140° F (-40° C to 60° C)
Gas Sample Requirements
Flow rate 2 scfh (1 LPM) - recommended
4 scfh (2 LPM) - maximum
Moisture 0 to 99% non-condensing
Analog 0 to 100mV standard
0V - 1V, 0V - 5V (optional)
4-20mA (isolated)
Digital RS232 bi-directional
Alarms Optional
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, polypropylene (typical)
Standard Gases CO2, HC, CO, O2, NOx, Butane, Propane, Methane
Power 90V - 260V AC maximum, 117 Vrms ± 10%, 50 Hz - 60 Hz
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:, Grp D, E Div 1, 2)
Weight 25 lbs. (11.35 kg)
Warranty Infrared Industries, Inc. warrants each gas analyzer it manufactures to be free of defects in material and workmanship for a period of one (1) year from the date of delivery. Abuse, misuse or unauthorized changes excluded. Extended warranty available.



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