IR-400 Series NDIR Optical Bench

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  • Measures up to 3 gases simultaneously under NDIR
  • Two auxiliary sensor inputs (electrochemical, paramagnetic, other)
  • Integration into OEM gas analyzer systems
  • Custom detectors and filters
  • Custom samples cells and sources
  • Custom materials and mechanical designs
  • Five versions with different length paths: IR-403, IR-406, IR-408, IR-410, and IR-412

Infrared Industries makes available its industry-leading NDIR optical benches for custom uses, including integration into OEM gas analyzer systems. We offer a wide range of abilities and features including custom detectors and filters, custom samples cells and sources, as well as custom materials and mechanical designs. Infrared Industries was the initial supplier of benches to the top automotive manufacturers in the 1970s and has built upon that technology to offer you gas analyzer component products that fit a wide range of needs.

Need a Customized Application?

Do you have a unique application that consists of a different range of gas not currently detected in the IR-400 Series? We can build a tailor-made optical bench that detects the gas of your choice.

Contact us today

The IR-400 Series NDIR Optical Benches from Infrared Industries are state-of-the-art and designed to do highly accurate gas analysis and to meet worldwide gas measurement standards. Selectivity of specific gases is obtained via an optical interference filter. Components are easy to reach and replace, which makes the unit highly serviceable.

The IR-400 Series benches can fit a wide variety of enclosures. The software and communications protocol are designed to make system integration simple and fast. The command set has the flexibility to provide a variety of output configurations including pneumatic controls, printers, measurement data, and selected displays. The system monitors and corrects for critical operating parameters that affect performance and provides real-time status of the overall integrity and quality of the gas measurement.

The IR-400 Series benches interface with analog outputs and to a PC for complete control, display, and graphing capability. Recording of the output data within the bench itself allows the measurements to be replayed and analyzed at a later time.

There are five benches in the IR-400 Series: the IR-403, IR-406, IR-408, IR-410, and IR-412 with 3-inch, 6-inch, 8-inch, 10-inch, and 12-inch paths.


General Specifications
Measuring method NDIR single beam
Electrochemical and paramagnetic also available
Gas measured User specified
Measuring range Per application
Accuracy ± 1% of full scale
Repeatability ± 1% of full scale
Zero drift ± 1% of full scale per 24 hours
Span drift ± 1% of full scale per 24 hours
Linearity ± 0.5% of full scale fitted to theoretical curve
Noise level Less than 1% of full scale
Warm-up time Ready for use in 5 minutes; fully stabilized in 15 minutes
Temperature range 32° F to 158° F (0° C to 70° C)
Ambient humidity Up to 95% relative humidity
Digital RS232
Gas Flow System
Power requirements 12VDC, 50 watts maximum
Materials Stainless steel sample cell, sapphire windows, selected o-rings, and Teflon tubing
Dimensions 4.6" x 4.25" and path length choice of 3", 6", 8", 10", or 12"
Weight 2 lbs. 1 oz. (907.184 grams)
Standard gases HC, CO, CO2, and O2; other gases also available
Accessories and Options Included Optional
One year standard warranty x
Extended warranty x
InfraView Software x
Analog or 4-20 mA outputs x
Kynar sample cell for corrosive sample streams x




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