Key Features

• Simultaneous multi-gas measurement: Measures multiple gas components in one analyzer, including SO₂, NOx (NO and NO₂), CH₄, HCl, HF, CO, CO₂, H₂O, and other configurable gases.
• Expandable gas measurement: Additional components such as NH₃, N₂O, SO₃, and VOCs can be added according to different monitoring requirements.
• High-temperature trace heating: The analyzer uses high-temperature tracing to maintain a stable sample temperature and help prevent condensation during flue gas measurement.
• Reduced water-vapor interference: FTIR spectral analysis combined with nonlinear least-squares fitting helps reduce interference from H₂O when measuring gases such as SO₂ and NOx.
• White Cell optical design: Uses a White Cell optical path to provide a long effective absorption path, high signal-to-noise ratio, low detection limits, and a wide dynamic measurement range.
• High-reflectivity gas cell: The internal gas cell uses gold-coated reflective surfaces to improve infrared reflectivity and support stable long-term measurement.
• Low detection limits: The extended optical path and spectral analysis improve sensitivity for low-concentration pollutant monitoring.
• Fast response: The optimized optical and analytical system provides rapid multi-component measurement for continuous emission and process monitoring.
• Anti-vibration interferometer: Uses a pyramid-mirror interferometer structure designed to reduce the influence of vibration and improve measurement stability in industrial environments.
• High system integration: One FTIR analyzer can replace several single-gas analyzers in suitable applications, reducing overall system complexity and maintenance requirements.
• Low maintenance cost: Multi-gas integration and modular construction help reduce maintenance workload and total system cost.
• Continuous online monitoring: Provides real-time gas concentration data for industrial process control, environmental monitoring, and continuous emission monitoring systems.
• Flexible concentration ranges: Measurement ranges can be configured from ppm to percentage levels according to different applications.
• Industrial communication: Supports RS232 and RS485 communication, Modbus protocol, and customized communication options for system integration.
• Wide industrial applications: Suitable for waste incineration, power generation, cement production, petrochemical processes, chemical manufacturing, semiconductor fabrication, environmental monitoring, and other multi-gas measurement applications.

Fourier Transform Infrared Spectroscopy (FTIR)

The FTIR technology owns wide coverage area. Each gas absorption has small interference, and it can simultaneously measure multiple gas components. When the infrared radiation enters the interferometer, it will produce two beams of coherent light. The gas sample in the gas chamber absorbs energy of coherent light with specific wavelength. When interferogram that contains sample gas absorption information has been detected by the detector, computer will perform Fourier transform and obtain the infrared spectrogram finally.

When the infrared radiation passes gas sample, it can be observed that some infrared radiation of certain wavelength cannot get through the gas completely. That is to say, different gases will absorb the infrared radiation of specific wavelength. The infrared radiation interacts with gas molecules, and then the gas molecules gain energy from the infrared radiation to start vibration or rotation. All the vibration and rotation will cause absorption of specific wavelength in the infrared radiation. in the infrared radiation.

The absorption spectrum presents absorption degree of sample in different infrared bands through graphical form. Spectrum displays a function that infrared radiation is regarded as wavelength when passing through gas. For each wavelength, to get transmittance T, divide the infrared radiation intensity when passing through the sample gas by the infrared radiation intensity when entering the sample gas. passing through the sample gas, If the radiation intensity that enters the sample is I0, and the radiation intensity through the sample is l, then the transmittance T can be expressed as:

T=I/I0

In formula: T=Transmittance I0=Intensity when entering the sample I=Intensity when passing through the sample

In addition, the logarithm of reciprocal value of transmittance T is the absorption of infrared radiation:

A = log10(1/T)

In formula: T=Transmittance A=Absorbance

Every kind of gas will be absorbed at specific position, and concentration information for each kind of gas can be forecasted through the established relation model between sample gas absorbance and concentration.