Instrument Principle
The instrument adopts the gas filter correlation infrared absorption method. The basic working principle is: CO has absorption characteristics for infrared radiation at a specific wavelength (4.67μm), and the absorption intensity is related to the CO concentration. Detection method: infrared light from the infrared light source sequentially passes through the CO and N₂ filters in the rotating filter wheel, then enters the optical cell through a narrow-band interference filter. When passing through the CO filter in the filter wheel, the infrared light is absorbed and therefore cannot absorb CO in the sample gas in the optical cell, forming a fixed-intensity reference beam; when passing through the N₂ filter in the filter wheel, the infrared light is not absorbed and irradiates the sample gas in the optical cell. CO in the sample gas absorbs infrared radiation, and the weakened infrared radiation forms the measurement beam. The infrared detector detects the reference beam and measurement beam respectively. Through the light intensity ratio of the two, the concentration of CO in the sample gas is calculated using the Lambert-Beer law.
Instrument Features
• Adopts 7-inch full-touch color screen, monitoring values can be switched freely between ppb, ppm, μg/m³, mg/m³;
• Chinese and English menu-style operation interface, easy to operate;
• With automatic range switching function;
• Monitoring values can be displayed graphically, and graphic curves can be freely zoomed;
• With automatic temperature and pressure compensation function;
• Adopts adaptive optimization algorithm to achieve optimal response time and signal-to-noise ratio;
• Supports remote calibration and remote diagnosis of internal working parameters;
• Massive historical data storage, query and output functions (one record every 5 minutes);
• With multi-parameter alarm function;
• Correlation wheel made with special process for long-term use;
• AC/DC dual power supply, one charge can be used for more than 10 hours;
• Can be preheated in advance, ready for rapid monitoring upon arrival at the site;
• Suitable for emergency monitoring and comparison monitoring.
