Working Principle:
The instrument adopts gas filtering related infrared absorption method. The basic working principle is that CO absorbs infrared radiation of a specific wavelength (4.67 μ m), and the strength of its absorption is related to the concentration of CO. The detection method is as follows: infrared rays from the infrared light source sequentially pass through the CO and N2 filters in the rotating filter wheel, and then enter the light chamber through the narrowband interference filter. When passing through the CO filter in the filter wheel, infrared rays are absorbed, so CO in the sample gas cannot be absorbed again in the light chamber, thus forming a reference beam with a fixed light intensity; When passing through the N2 filter in the filter wheel, infrared radiation is not absorbed and shines on the sample gas in the light chamber. CO in the sample gas absorbs infrared radiation, and the weakened infrared radiation forms a measurement beam. Detect the reference beam and measurement beam separately using an infrared detector. Calculate the concentration of CO in the sample gas using the Lambert Beer law based on the ratio of their light intensities.

　　Instrument features:
◆ Equipped with a 7-inch full touch color screen, the monitoring values can be switched freely between ppb, ppm, μ g/m3, and mg/m3;
◆ Chinese and English menu style operation interface, easy to operate;
◆ Equipped with automatic range conversion function;
The monitoring values can be displayed graphically, and the graphical curves can be freely scaled.
◆ Equipped with automatic temperature and pressure compensation function;
Adopting adaptive optimization algorithms to achieve optimal response time and signal-to-noise ratio;
◆ Support remote calibration and remote diagnosis of internal working parameters;
◆ Massive historical data storage, query, and output function (one every 5 minutes);
◆ Equipped with multi parameter alarm function;
The wheels made with special techniques can be used for a long time;
Dual use of AC and DC, can be used for more than 10 hours on a single charge;
◆ It can be preheated in advance and arrive at the site quickly.
◆ Suitable for emergency monitoring and comparative monitoring.