Recently, frequent hazardous gas incidents across the country have aroused widespread concern from all parties, especially the major accident 12.4 in Chongqing Yongchuan Coal Mine, which makes "hazardous gas detection" once again enter people's vision. China has always been particularly strict in the detection of dangerous gases in the workplace, but due to the different degree of attention and economic conditions of enterprises, there are still a large number of environmental risks in an uncontrollable state.

In order to ensure the personal safety of factory employees, at the same time, in order to save costs, employees can be equipped with multifunctional gas detectors, which can be carried with them for personal gas detection or placed in areas with gas hazards for regional detection.Through the gas detector comes with the sound and light alarm automatic alarm, timely remind to ensure the safety of employees.

principle and classification of gas detector

gas detector is the 1 instrument that can detect the composition and concentration of various gases in the environment. at present, there are many brands and varieties of gas detectors on the market. when selecting gas detectors, companies should make more comparisons and choose suitable gas detectors. gas detectors are mainly divided into portable gas detectors and fixed gas detectors, the core technology of the gas detector is sensor technology. According to the different gas sensor detection technology, the classification of the gas detector is also different.

Gas sensors can be divided into 4 categories in principle:

(1) Electrical gas sensors use the electrical parameters of materials to change with the change of gas concentration, and are divided into: Resistive and non-resistive, resistive gas sensors mainly include contact combustion type, thermal conductivity type, semiconductor gas sensors (also metal oxide semiconductor gas sensors and organic semiconductor gas sensors), etc., while non-resistive gas sensors usually use the current or voltage of the material to follow the gas Content changes.

(2) Optical gas sensors use the optical properties of gases to detect gas composition and concentration, and are divided into: infrared absorption type, visible light absorption photometric type, light interference type, chemiluminescence type and test paper photoelectric photometric type, photoionization type, etc.

(3) Electrochemical sensors are made of polymer gas-sensitive materials, and are divided into: polymer resistance type, polymer dielectric type, and concentrated gas sensors, which use electrochemical properties.

(4) polymer gas sensitive materials such as gas differential battery type, surface acoustic wave type, quartz oscillator type, etc.

Commonly used gas detector

Multifunctional gas detector is the 1 kind of gas detector, which is widely used because it can detect a variety of gases at the same time.

The multifunctional gas detector, as its name implies, is an instrument used to detect the content of one or more gases in the environment. The detector uses natural diffusion to detect gases, and uses electrochemical and combustion gas sensors. It has excellent sensitivity and excellent repeatability. The multifunctional gas detector can detect 4 gases such as oxygen, combustible gas, carbon monoxide and hydrogen sulfide, and can store up to 130000 detection data, with the software, historical data can be viewed at any time.

whether it is a gas detector or a multifunctional gas detector, we must pay attention to the use of matters when using:

1, avoid violent impact and extrusion when using;

2, charging should be in a safe area, it is strictly prohibited to charge in flammable and explosive dangerous areas;

3, should be carried out by specialized personnel or institutions. During maintenance, the model, specification and parameters of the original circuit parts shall not be changed;

4. Please use the special charger matched by the manufacturer when charging;

5. Do not squeeze the display screen with your hands;

6. When the gas concentration is too high, it will adversely affect the electrochemical sensor of the instrument or damage the sensor;

7. When the battery power is too low, the buzzer will sound "di, di" and automatically shut down. Please charge before use.

The gas detector has excellent sensitivity and excellent repeatability. It can be used in petroleum, chemical industry, environmental protection, metallurgy, refining, gas transmission and distribution, biochemical medicine, agriculture and other industries. It can be used for real-time detection in the environment containing combustible gas and other explosive gases or toxic gases such as carbon monoxide, hydrogen sulfide and oxygen.In a dangerous environment, safety is no small matter and needs to be prevented. We should play 120 percent of the spirit, to ensure that no harmful gas leakage, to achieve safe production.