Advantages of infrared sensors in gas detector
Among gas detectors, many gas detectors can already be equipped with infrared sensors. Due to the advantages of infrared sensors such as fast, accurate, and non-poisoning, infrared sensors have become very common in the practical application of gas analysis technology. In the future , Among the gas sensors of gas detectors, infrared sensors will be used more and more, and 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 sensors The instrument market share in foreign countries is about 74%.
Most of the major manufacturers of domestic NDIR infrared gas analyzers used the infrared gas analysis method in the early 1980s. They used nickel wires and motors to mechanically modulate the infrared light source, and used 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 a thin-film capacitor microphone as a sensor 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 infrared gas sensor has been developed rapidly abroad. It has no mechanical modulation device, uses a new type of infrared sensor and electric modulation light source, and adopts low power consumption embedded in the instrument circuit. The system makes the instrument have incomparable advantages in volume, power consumption,
performance and price compared with previous instruments.
In the future, gas detection instruments and meters using semiconductor and catalytic principles will still occupy part of the low-end market relying on price advantages. Electrochemical sensors and detection instruments have outstanding comprehensive advantages in the fields of low-concentration toxic gases, organic vapors, alcohol gases, and oxygen monitoring that require high precision. However, infrared sensors and instruments are suitable for monitoring various flammable, explosive, and carbon dioxide gases. High, good selectivity, high reliability, no poisoning, no dependence on oxygen, less 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 industry-leading market and gradually becoming the mainstream of the market in the future.
Among the gas detectors, there are Huarui 4-in-1 gas detector_, BW pump-suction 4-in-1 gas detector, Huarui gas detector, Mesian gas detector, etc., and some models use infrared sensors.
