Background:

Gas sensor is a kind of sensor equipment which will exist a specific gas in a certain range or continuously measure the composition of gas. And through the use of gas sensors to monitor the industrial and living environment pollution. It's a very common way of monitoring. Gas sensors are widely used in coal mine, chemical industry, agriculture, municipal administration, medical treatment and other areas that need protection. It is often used to detect flammable, flammable and toxic gases. It can also measure oxygen consumption and so on. In some electric power enterprises and manufacturing industry, gas sensors are also used to quantitatively detect the concentration of various components in the flue gas to judge harmful gas emissions and combustion.

Characteristics of gas sensors：

Gas sensitivity: The sensitivity of a gas sensor refers to the ratio of the change in the sensor's output to the measured change.

Corrosion resistance: The corrosion resistance of a gas sensor refers to the ability of the sensor to expose a high volume fraction of the target gas. In the encounter of a large number of toxic gas suddenly burst, the sensor monitoring probe will be corroded by toxic gas. Gas sensors are required in the face of such a large number of toxic gases. In return to normal operating conditions, the sensor use error is more likely to be low. If there is a large amount of gas leakage, the sensor probe can withstand up to 20 times the gas volume. Under normal working conditions, the sensor drift correction value should be as small as possible.

Classification of gas sensors：

1, according to the different types of detected gas, divided into combustible gas sensor and toxic gas sensor, harmful gas sensor and so on.

2, can also be divided into portable sensors and fixed sensors according to the installation and use of gas sensors.

3. According to the way of obtaining the monitoring gas, the sensor can be divided into diffused sensor and suction sensor.

4, according to the detection principle of the gas sensor, the gas sensor is divided into thermal sensor, electrochemical sensor, magnetic gas sensor, optical lift sensor and semiconductor gas sensor, gas chromatography sensor and so on.

Common gas detection methods：

1, semiconductor gas sensor: semiconductor gas sensor, in order to detect high concentration of combustible gas. More can detect the PPM level of relatively high toxic and harmful gases. The advantages of this kind of sensor are high sensitivity and fast reaction speed. But at the same time, it has the disadvantages of small measuring range and easy to be affected by the environment.

2, electrochemical gas sensor: at present, the detection of toxic and harmful gases in chemical pollution is more common and mature sensor type is electrochemical sensor. Although the electrochemical gas sensor is prone to interference, it will be greatly affected by the change of temperature in the air. But this kind of sensor has the characteristics of high sensitivity and high stability. It can be used in the determination of sulfuric acid, air separation and boiler combustion gases, so it is widely used.

Type of gas sensor monitoring：

1. Toxic gases include methane, hydrogen sulfide, carbon monoxide, carbon dioxide, hydrogen cyanide and so on. These gases can cause harm to the internal organs of the body through the respiratory organs. It also inhibits the ability of internal tissues or cells to exchange oxygen. Cause organism anoxia and produce asphyxiation sex poisoning, therefore also call asphyxiation sex gas.

2, corrosive gases are generally disinfection gases such as chlorine, ozone, chlorine dioxide gas leakage, the respiratory system of the human body corrosion and poisoning.

3, flammable and explosive gas and air mixture reaches a certain proportion. Meet open fire can cause combustion and even explosion, and cause harm. Such as methane, hydrogen and so on.

JXCT  Fixed CH4 gas sensor：

JXCT's fixed methane gas sensor has an industrial grade HD interface and a die cast aluminum housing. It has the advantages of waterproof, dustproof, explosion-proof and dew proof. 15 seconds fast response, more accurate detection, ensure life. Female high definition LCD color screen display, industrial high definition interface, 320*240 resolution intuitive display. Multi-machine alarm controller selection, abundant optional external control ports. Easy to use, sound and light alarm. Can respond quickly in 15 seconds, the probe adopts international high quality sensor probe. Monitoring more accurate, life assurance.More explosion-proof gas sensors, welcome to jingxun unblocked consultation, manufacturers direct sales, support customization.

Portable 4 in 1 Gas Detector :

The 4-in-1 gas detector is a multi-parameter gas monitoring device developed by JXCT that can monitor a variety of gases. Supports the detection of combustible gases, toxic and harmful gases. Multi-gas detector can monitor 4 kinds of toxic combustible gas at the same time, can customize the gas detection parameters 4, 1, 2, 1, 3, 1. Multi-gas detector, waterproof, dustproof, accurate detection data, sound and light alarm, long service life. The multi-gas detector can be used in gas leakage and pharmaceutical factory scenarios. Body ABS shell, feel comfortable, light. IPS color screen interface, 320*240 resolution, more intuitive display. When the detected amount of gas is greater than the set amount of gas, the sensor will turn on the light alarm, and the high-decibel buzzer will sound. Red logo, timely reminder, high security.