Among the gas detectors, many gas detectors have been equipped with infrared sensors. Due to the fast, accurate, and non-toxic advantages of infrared sensors, the practical application of infrared sensors and gas analysis technology has been very common. In the future , Among the gas sensors of gas detectors, infrared sensors will be used more and more widely.
As we have said before, gas detection includes detection tube type, electrochemical type, semiconductor type, ionization type, catalytic combustion type, infrared sensor type, etc. Up to now, electrochemical sensors are widely used, but now NDIR infrared The market share of instruments in China and abroad is about 74%.
Most of the major domestic manufacturers of NDIR infrared gas analyzers adopted the infrared gas analysis method in the early 1980s, using nickel nuclei and motor to mechanically modulate the infrared light source, and using thin film capacitor microphones or InSb as sensors. Using motor mechanical modulation, the power consumption of the instrument is large, and the stability is poor, and the cost of the instrument is also high. The use of thin-film capacitor microphones as sensing makes the instrument very sensitive to vibration, so it is not suitable for portable measurement.
With the development of infrared light source, sensor and electronic technology, NDIR infrared gas sensor has developed rapidly abroad. It has no mechanical modulation device, adopts new infrared sensor and electric modulation light source, and adopts low-power embedded embedded in the instrument circuit. This system makes the instrument have incomparable advantages in volume, power consumption, performance and price.
In the future, gas detection instruments and meters using semiconductor and catalytic principles will still occupy part of the low-end market by virtue of their price advantage. Electrochemical sensors and detection instruments have outstanding comprehensive advantages in the monitoring of low-concentration toxic gases, organic vapors, alcohol gases, and oxygen that require high accuracy, but infrared sensors and instruments are suitable for monitoring various flammable, explosive, and carbon dioxide gases, with high High, good selectivity, high reliability, non-toxic, independent of oxygen, less affected by environmental interference factors, long life and other significant advantages. These advantages will lead to gas detection instruments based on electrochemical and infrared principles occupying a wider market of excellent industry, and will gradually become the mainstream of the market in the future.
Among the gas detectors, there are Huarui four-in-one gas detector_, BW pump-suction four-in-one gas detector, Huarui gas detector, Mesian gas detector, etc. Some models use infrared sensors.
