The role of CO sensor in fire warning
The role of CO sensor in fire warning
With the development of the petrochemical industry, the types and applications of flammable, explosive, and toxic gases have increased. The leakage of these gases in the process of production, transportation and use will lead to poisoning, fire and even explosion accidents, which will seriously endanger people's lives and property. Due to the diffusivity of the gas itself, after the leakage occurs, under the action of external wind and internal concentration gradient, the gas will spread along the surface of the ground, forming a burning explosion or poisonous danger zone at the accident site, and expanding the hazardous area. Timely and reliable detection of the content of certain gases in the air, taking effective measures to remedy, adopting correct disposal methods, reducing accidents caused by leakage, is a necessary condition to avoid causing major property and casualties, which puts forward a fire alarm system. Higher requirements.
In the fire alarm system, the fire alarm is an important component of it, and it is also the sensory "organ" of the fire alarm system. Once there is a fire, the characteristic physical quantities of the fire, such as temperature, smoke, gas and radiation intensity, are converted into electrical signals, and an alarm signal is immediately sent to the fire alarm controller. It is foreseeable that electronic equipment will be increasingly involved in current and future fire monitoring efforts. In these electronic devices, the sensor is equivalent to an organ that receives external signals, such as the human eye, ears, and skin, and it will play an irreplaceable role. Among them, temperature sensing sensors, smoke sensors, gas sensors and other sensor monitoring methods will be more and more involved in various types of fire early warning monitoring systems, thus helping the fire prevention work to be standardized, scientific and informationized at an early date.
At present, the civilian field is the main application field of semiconductor metal oxide gas sensors. This is mainly because the price of the semiconductor metal oxide gas sensor is cheap and the performance can meet the requirements of the home alarm. The application of gas sensors in the civil field is mainly reflected in: in the kitchen, the detection of leakage of civil gas such as natural gas, liquefied petroleum gas and city gas, when the fire occurs, especially in the early stage of the fire, due to incomplete combustion, the construction at the fire site There will be a large amount of carbon monoxide in the property, which directly threatens the safety of the people in the building and the firefighters who will enter the fire scene to rescue. Therefore, it is imperative that the fire alarm is equipped with a carbon monoxide sensor with a wide measuring range, high precision and fast response speed.
The carbon monoxide gas sensor produced by Rainbow Technology is a micro-gas sensor based on metal oxide material, which can be used to detect the content of carbon monoxide gas in the air. The sensor has the characteristics of low power consumption, small size and low cost. The sensitive material is coated on the electrode. When the CO gas contacts the sensitive material, the conductivity of the sensitive material changes, and the specific circuit can be used to convert the change of the conductivity into an output signal corresponding to the gas concentration. On this basis, Rainbow Technology independently developed the MHD2002 gas sensor module, which can simultaneously identify and detect methane and carbon monoxide gas components and contents in the air. The sensor module has the characteristics of anti-ethanol (alcohol) interference and overcomes The traditional metal oxide carbon monoxide sensor has a strong response to ethanol gas. Even in the 6000ppm high concentration ethanol gas atmosphere, there is no false alarm, and the use of alcohol-containing reagents (such as cooking wine, perfume, air freshener, etc.) is avoided. ) caused by false positives. The module features multi-gas identification, low power consumption, small size, high precision, low cost, etc. The sensors of the MHD2002 series modules are multi-channel gas sensors composed of different material systems, using specific conditioning circuits and precise algorithms. The change in response conductivity is converted into an electrical signal corresponding to the type and concentration of the gas.
With the development of the petrochemical industry, the types and applications of flammable, explosive, and toxic gases have increased. The leakage of these gases in the process of production, transportation and use will lead to poisoning, fire and even explosion accidents, which will seriously endanger people's lives and property. Due to the diffusivity of the gas itself, after the leakage occurs, under the action of external wind and internal concentration gradient, the gas will spread along the surface of the ground, forming a burning explosion or poisonous danger zone at the accident site, and expanding the hazardous area. Timely and reliable detection of the content of certain gases in the air, taking effective measures to remedy, adopting correct disposal methods, reducing accidents caused by leakage, is a necessary condition to avoid causing major property and casualties, which puts forward a fire alarm system. Higher requirements.
In the fire alarm system, the fire alarm is an important component of it, and it is also the sensory "organ" of the fire alarm system. Once there is a fire, the characteristic physical quantities of the fire, such as temperature, smoke, gas and radiation intensity, are converted into electrical signals, and an alarm signal is immediately sent to the fire alarm controller. It is foreseeable that electronic equipment will be increasingly involved in current and future fire monitoring efforts. In these electronic devices, the sensor is equivalent to an organ that receives external signals, such as the human eye, ears, and skin, and it will play an irreplaceable role. Among them, temperature sensing sensors, smoke sensors, gas sensors and other sensor monitoring methods will be more and more involved in various types of fire early warning monitoring systems, thus helping the fire prevention work to be standardized, scientific and informationized at an early date.
At present, the civilian field is the main application field of semiconductor metal oxide gas sensors. This is mainly because the price of the semiconductor metal oxide gas sensor is cheap and the performance can meet the requirements of the home alarm. The application of gas sensors in the civil field is mainly reflected in: in the kitchen, the detection of leakage of civil gas such as natural gas, liquefied petroleum gas and city gas, when the fire occurs, especially in the early stage of the fire, due to incomplete combustion, the construction at the fire site There will be a large amount of carbon monoxide in the property, which directly threatens the safety of the people in the building and the firefighters who will enter the fire scene to rescue. Therefore, it is imperative that the fire alarm is equipped with a carbon monoxide sensor with a wide measuring range, high precision and fast response speed.
The carbon monoxide gas sensor produced by Rainbow Technology is a micro-gas sensor based on metal oxide material, which can be used to detect the content of carbon monoxide gas in the air. The sensor has the characteristics of low power consumption, small size and low cost. The sensitive material is coated on the electrode. When the CO gas contacts the sensitive material, the conductivity of the sensitive material changes, and the specific circuit can be used to convert the change of the conductivity into an output signal corresponding to the gas concentration. On this basis, Rainbow Technology independently developed the MHD2002 gas sensor module, which can simultaneously identify and detect methane and carbon monoxide gas components and contents in the air. The sensor module has the characteristics of anti-ethanol (alcohol) interference and overcomes The traditional metal oxide carbon monoxide sensor has a strong response to ethanol gas. Even in the 6000ppm high concentration ethanol gas atmosphere, there is no false alarm, and the use of alcohol-containing reagents (such as cooking wine, perfume, air freshener, etc.) is avoided. ) caused by false positives. The module features multi-gas identification, low power consumption, small size, high precision, low cost, etc. The sensors of the MHD2002 series modules are multi-channel gas sensors composed of different material systems, using specific conditioning circuits and precise algorithms. The change in response conductivity is converted into an electrical signal corresponding to the type and concentration of the gas.
CO Gas Sensor
(MHD2002 Module)
