The core principle of an infrared carbon monoxide analyzer is based on the absorption characteristics of gas molecules towards specific wavelengths of infrared light. According to the theory of quantum mechanics, molecules absorb specific frequencies of infrared light during vibration or rotation, forming characteristic absorption spectra. Carbon monoxide molecules exhibit a strong absorption peak near a wavelength of 4.6 micrometers. When a carbon monoxide gas sample is placed between an infrared light source and a detector, some of the infrared light is absorbed by the gas, resulting in a decrease in the intensity of light received by the detector. By measuring the degree of attenuation of light intensity and combining it with Beer's law (the concentration of the measured gas is proportional to the absorption intensity), the concentration of carbon monoxide in the sample can be accurately calculated.

This technology adopts Non Dispersive Infrared (NDIR) method, which does not use spectral elements to disperse infrared light into monochromatic light, but directly uses the absorption characteristics of gas at specific wavelengths for detection. This design simplifies the optical system structure, improves detection efficiency, and further eliminates background interference through gas filtering correlation technology (GFC).

Characteristics of Infrared Carbon Monoxide Analyzer:

1. Strong anti-interference ability and high detection accuracy

Infrared carbon monoxide analyzer uses the characteristic absorption spectrum of gas molecules for detection. Compared with the defect of electrochemical sensors that are susceptible to cross gas interference, infrared technology can accurately identify carbon monoxide molecules and avoid interference from other gas components on the detection results.

2. Long term stability and rapid response

The infrared light source adopts a long-life design, and key components such as filters and detectors have stable performance, which can maintain low drift of detection results during long-term continuous operation. In the environmental air quality monitoring station, the instrument needs to operate continuously for 24 hours. The infrared analyzer can periodically correct zero and range drift through automatic calibration function to ensure data reliability. At the same time, its gas chamber design is compact, gas exchange is rapid, and combined with high-sensitivity detectors and fast signal processing circuits, the time from gas entering the gas chamber to obtaining detection results is usually only a few seconds to tens of seconds, which can reflect changes in gas concentration in real time and is suitable for emergency scenarios such as sudden gas leakage monitoring.

3. Multi gas synchronous detection and functional expansion

Most infrared carbon monoxide analyzers adopt a dual channel or multi-channel design, which can simultaneously detect the concentrations of carbon monoxide and carbon dioxide. Some models can also be extended to detect infrared active gases such as sulfur dioxide and nitrogen oxides. In automobile exhaust detection, instruments can synchronously analyze the emission ratio of carbon monoxide and carbon dioxide in exhaust, providing multidimensional data support for engine combustion efficiency evaluation. In addition, the instrument can integrate a temperature and humidity measurement module, which eliminates the influence of environmental factors on the detection results through a built-in temperature and humidity compensation algorithm, further improving data accuracy.

4. Portability and intelligent operation

Adopting lightweight design, the weight is usually controlled within 3 kilograms, equipped with aluminum alloy protective shell and replaceable filter, suitable for field investigation, industrial inspection and other on-site environments. The instrument is equipped with a dual-purpose AC/DC power supply and supports switching between nickel cadmium battery power and 220V mains power. It can work continuously for more than 24 hours.

In the field of environmental monitoring, infrared carbon monoxide analyzer is the core equipment of air quality monitoring stations, which can monitor the concentration of carbon monoxide in the atmosphere in real time and provide data support for pollution control and early warning; In industrial production, instruments are used for boiler combustion optimization, chemical synthesis process control, and other scenarios. By accurately monitoring the concentration of carbon monoxide emissions, they help enterprises achieve energy conservation, emission reduction, and safe production; In automobile exhaust detection, infrared analyzer is a key tool for annual inspection line and engine development testing, which evaluates the compliance of vehicle emissions and combustion efficiency by analyzing exhaust composition; In the medical field, instruments can be used for emergency treatment and anesthesia surgery monitoring of carbon monoxide poisoning. By detecting the concentration of carbon monoxide in the patient's exhaled gas, they provide a basis for developing treatment plans.