CO Sensors for Vehicle Safety: Toxic Gas Carbon Monoxide Detector
In recent years, the number of motor vehicles in my country has increased sharply, and the problem of safe operation of motor vehicles has become more and more prominent. Strengthening the management of motor vehicles and paying attention to the safety technology inspection of motor vehicles has become an urgent research and solution for the whole society, especially the public security traffic management department. It is an important topic, and it also provides a good opportunity for the development of my country's motor vehicle safety technology testing.
With the development of my country's automobile safety testing equipment market, the application and research and development of core production technologies related to it will surely become the focus of industry companies. Understanding the research and development trends, process equipment, technology applications and trends of domestic and foreign automotive safety testing equipment production core technologies is critical for companies to improve product technical specifications and market competitiveness.
Carbon monoxide (CO) is an inorganic compound in the air. Under normal conditions, carbon monoxide is a colorless, odorless, tasteless, insoluble gas with a melting point of -199°C and a boiling point of -191.5°C. The density of gas under standard conditions is l. 25g/L, and the air density (1.293g/L under standard conditions) has a small difference, which is also one of the factors that are prone to gas poisoning. It is a neutral gas.
When detecting carbon monoxide, pay attention to:
(1) The main components of Hopcalate oxidant are manganese oxide and copper oxide. Its function is to oxidize carbon monoxide in the air into carbon dioxide, which is used for zero adjustment of the instrument. The oxidation efficiency of the oxidizing agent should reach 100% below 100°C. In order to ensure its oxidation efficiency, it should be kept dry during use and storage.
(2) The main performance indicators of the carbon monoxide infrared gas analyzer are as follows: Measuring range: 0-30ppm; 0-100ppm two levels. Reproducibility: ≤±0.5% full scale. Zero drift: ≤±2% full scale/4h. Span drift: ≤±2% full scale/4h. Linear deviation; ≤±1.5% full scale. Start time: 30min. Carbon dioxide interference: 500ppm CO2≤±2% full scale. Air extraction flow: about 500ml/min. Response time: <15s from pointer indication to 90% of full scale.
(3) Non-measured components in the ambient air, such as methane, carbon dioxide, water vapor, etc., can affect the measurement results. However, the use of serial infrared detectors can mostly eliminate the interference of the above non-measured components.
(4) Due to the interference of water vapor, during the measurement. The air sample should be dried through the hose before entering the instrument for measurement.
(5) The instrument can measure continuously. The air to be measured is introduced into the instrument with a polytetrafluoroethylene tube, connected to a recorder, and the change of carbon monoxide concentration in the air can be monitored for 24 hours or for a long time.
(6) After the instrument is started. It must be fully preheated and stabilized for more than 1 hour. Then carry out the sample measurement, otherwise the accuracy of the measurement results will be affected.
(7) The detection limit concentration of this method is 1ppm.
