Non-Dispersive Infrared (NDIR) Analyzers

BHB provides a wide range of gas analyzers using different analysis modules according to the sample characteristics and the intended applications.

The Non-Dispersive Infrared (NDIR) Gas Analyzer that allows a selective analysis of the concentration up to a maximum of four sample components is usually provided in a Continuous Emissions Monitoring System (CEMS) or in a Process Analysis integrated solution.

MEASURING PRINCIPLE:

• Absorption of the non-dispersive infrared radiation at a wavelength of ʎ = 2.5 … 8 µm.

COMMON APPLICATIONS:

• Emissions Monitoring;
• Combustion Control;
• Gas Monitoring in Landfills;
• Gas Manufacturing/ Purity Control;
• Burners Optimization;
• Process Control, for example in Chemical Industries, Iron and Stainless Steel, Energy Plants;
• Fermentation Process Monitoring;
• Analysis of Blast Furnace Gas.

EXAMPLES OF THE COMPONENTS AND THE RESPECTIVE MINIMUM MEASUREMENT RANGES:

• CO 0…10 ppm;
• CO₂ 0…5 ppm;NO 0…150 ppm;
• SO₂ 0…25 ppm;
• N₂O 0…20 ppm;
• CH₄ 0…50 ppm;
• C₃H₈ 0…50 ppm;
• C₂H₄ 0…300 ppm; 
• R134 0…50 ppm.

CALIBRATION:

• Automatic calibration by internal control;
• Zero and span are obtained from calibration cuvettes or standard gas.

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