carbon monoxide gas detectorIt is an electronic device used to detect carbon monoxide gas, which can emit an audible or light alarm when the concentration of carbon monoxide in the air exceeds the standard.
1. According to the function score:
According to whether it has a control output, it can be divided into with control output and without control outputcarbon monoxide gas detectorboth. The carbon monoxide gas detector with control output outputs the sound and light alarm signal and also outputs the switching signal, usually a pair of normally open contacts or a pair of normally closed contacts, which can be used to drive the exhaust fan or force open the window. Without control output, only the sound and light alarm signal is output, and no other signal output is produced.
2. According to the type of sensor:
commonly usedcarbon monoxide sensorThere are two types: electrochemical sensors and semiconductor sensors. Electrochemical sensors have high accuracy and stability, so the price is relatively high. Electrochemical sensors consume less power and are battery-powered. Semiconductor sensors consume a lot of power and are usually not powered by batteries.
3. According to the application occasion:
It can be divided into industrial and householdcarbon monoxide gas detectorboth. Industrial carbon monoxide gas detectors are expensive, require very high accuracy, very low temperature and zero point spill, and often require explosion-proof housings in some special occasions. Industrial carbon monoxide gas detectors must use electrochemical sensors. Household carbon monoxide gas detector is mainly used in ordinary households, small entertainment venues and small factories and small chemical laboratories, etc., with a relatively small appearance and relatively low price. In the past few years, both industrial and household carbon monoxide gas detectors mainly relied on imports, and since 2007, China's self-produced and self-sold carbon monoxide gas detectors have begun to increase. China's earlier engaged in the research and design of electrochemical carbon monoxide sensors and alarms, the production and sales of technology-based companies include Shenzhen Jiaheyi Technology Co., Ltd.
According to whether it is connected to the alarm host, there are two types: independent type and networked type. The stand-alone alarm is not connected to the host to complete independent detection and alarm functions. The networked type must be used in conjunction with the alarm host to complete the complete detection and alarm function, usually the alarm completes the detection function, transmits the alarm signal to the alarm host, and the alarm host completes the alarm function of arranging the response. There are two types of networking: wired networking and wireless networking. The wired networking type is connected to the host through the signal line, and the wireless networking type is connected to the alarm host through the wireless signal, usually incarbon monoxide gas detectorto implement this function.
3. The harm of carbon monoxide gas
Carbon monoxide is a colorless, odorless, and non-irritating gas, so it is also known as the "invisible killer". Its chemical formula is: CO. Coal or any carbon-containing substance produces carbon monoxide when it is not completely burned. Carbon monoxide inhalation can cause immediate death in severe cases, and chronic poisoning in mild cases. What is commonly referred to as gas poisoning is actually carbon monoxide poisoning. Non-occupational carbon monoxide poisoning deaths are the third major accidents in China after traffic fatalities and production accidents.
4.carbon monoxide gas detectorwithGas alarmThe difference
carbon monoxide gas detectorWithGas alarmThere is a big difference, and many dealers and users often confuse the two. In fact, there is a big difference between the two, if you are not careful, you will install the gas alarm incorrectly when you need to use the carbon monoxide gas detector, and install the carbon monoxide gas detector when you should install the gas alarm, which will bring great losses to people's lives and property.
carbon monoxide gas detectorIt is used to detect carbon monoxide gas (CO). It cannot be used to detect alkane gases such as methane (CH4).
on the marketGas alarmIt is usually used to detect natural gas, LPG or coal-to-gas, etc., and municipal pipeline gas is usually one of the three gases. The main components of these gases are alkane gases such as methane (CH4), which are mainly characterized by a pungent odor. When the concentration of these flammable gases in the air exceeds a certain standard, it will cause an explosion. Gas alarms detect this explosive alkane gas and cannot be used to detect carbon monoxide gas.
Urban pipeline coal-to-gas is a relatively special gas, which contains both CO and alkane gases. Therefore, if it is only to detect whether there is a leak of pipeline gas, it can be detected with both carbon monoxide gas detector and gas alarm. However, if you want to detect whether pipeline natural gas, LPG or coal-to-gas produces excess carbon monoxide gas during combustion, you need to use a carbon monoxide gas detector. In addition, carbon monoxide gas (CO) is produced by burning coal for heating with a coal stove, not alkane gas such as methane (CH4). So you should use a carbon monoxide gas detector instead of a gas alarm. If you use a coal stove for heating, it is useless to install a gas alarm when burning coal, and if a person is poisoned, the gas alarm will not sound. This is quite dangerous.
In short, if you are testing toxic gases and are concerned about whether they will be poisoned, then you must choose a carbon monoxide gas detector. If you want to detect explosive gases and are concerned about whether there is a leak in the pipeline, you can generally use a gas alarm. Commonly used gas alarms use semiconductor sensors, so the cost is low.
5. How to buycarbon monoxide gas detector
First, choose whether it is industrial or household depending on your application. If you choose a home one, and then choose electrochemical or semiconductor according to the requirements for carbon monoxide gas detector, it is generally recommended to choose electrochemicalcarbon monoxide gas detector。 At the same time, when purchasing, it is recommended not to buy a gas alarm with many gaps on the surface, especially a large number of alarms with gaps of more than one millimeter, because the surface gap is large, which is easy to let dust and small insects enter the alarm, and a large amount of dust or small insects will block the air inlet of the carbon monoxide sensor and affect the accuracy of the carbon monoxide gas detector.
Ordinary users do not have professional equipment, how to check whether the carbon monoxide gas detector is sensitive? You can place the carbon monoxide gas detector at the exhaust port of the car below Euro II emissions to see if there will be an alarm, because the exhaust gas of cars below Euro II often contains excess carbon monoxide gas.
How can ordinary users check whether the carbon monoxide gas detector will be falsely alarmed, and what they buy back is indeed a carbon monoxide gas detector instead of being deceived into buying a gas alarm? Use the lighter to try it, use the lighter without ignition, deflate for one to two minutes, see if it alarms, the alarm is the gas alarm, and the one that does not alarm is the carbon monoxide gas detector.
6. How to install and maintain carbon monoxide gas detector
Because carbon monoxide gas is lighter than air, it is recommended to putcarbon monoxide gas detectorMount on or close to the ceiling. Do not install in places with high air flow. Use a small vacuum cleaner at regular intervals to suck up dust from the surface of the carbon monoxide gas detector.
7. The working principle of carbon monoxide gas detector
The carbon monoxide gas detector uses a carbon monoxide sensor to convert the concentration signal of carbon monoxide gas in the air into a weak current or voltage signal, and then amplifies the signal at one or two stages, and transmits it to the microcontroller for signal comparison and processing.
