Application of gas detectors in different environments
Recently, the frequent occurrence of dangerous gas incidents in various places has aroused widespread concern from all parties, especially the 12.4 major accident in Yongchuan Coal Mine in Chongqing, which has brought "dangerous gas detection" into people's field of vision once again. my country has always been very strict on the detection of hazardous gases in the workplace, but due to the different levels of attention and economic conditions of enterprises, there are still a large number of environmental risks that are uncontrollable.
In order to ensure the personal safety of factory employees and save costs, the company can equip employees with multi-function gas detectors, which can be carried with them for personal gas detection or placed in dangerous gas areas for regional detection. Through the sound and light alarm that comes with the gas detector, it will automatically alarm, timely reminding to ensure the safety of employees.
The principle and classification of gas detector
A gas detector is an instrument that can detect the composition and concentration of various gases in the environment. At present, there are many brands and types of gas detectors on the market. When choosing a gas detector, companies should compare and choose the gas that suits them. Detectors and gas detectors are mainly divided into portable gas detectors and fixed gas detectors. The core technology of gas detectors is sensor technology. According to different gas sensor detection technologies, the classification of gas detectors is also different.
Gas sensors can be divided into four categories in principle:
(1) Electrical gas sensors, which use the electrical parameters of materials to change with the change of gas concentration, are divided into: resistance type and non-resistance type, resistance type gas sensors mainly include contact combustion type, thermal conductivity type, semiconductor gas sensor ( Also known as metal oxide semiconductor gas sensors and organic semiconductor gas sensors), etc., non-resistive gas sensors usually use the current or voltage of the material to change with the gas content.
(2) Optical gas sensor, which uses the optical properties of gas to detect gas composition and concentration, and is divided into: infrared absorption type, visible light absorption photometric type, optical interference type, chemiluminescence type and test paper photoelectric photometric type, photoionization type Wait.
(3) Electrochemical gas sensor, which utilizes electrochemical properties.
(4) Gas sensors of polymer gas-sensing materials are made of polymer gas-sensing materials, and are divided into: polymer resistance type, polymer dielectric type, concentration difference battery type, surface acoustic wave type, quartz oscillator type, etc.
Commonly used gas detectors
Multifunctional gas detector is a kind of gas detector, which is widely used because it can detect multiple gases at the same time.
As the name suggests, the multi-function gas detector is an instrument used to detect the content of one or more gases in the environment. Repeatability, the multi-function gas detector can detect four kinds of gases: oxygen, combustible gas, carbon monoxide, and hydrogen sulfide, and can store up to 130,000 detection data. With the software, historical data can be viewed at any time.
Whether it is a gas detector or a multi-function gas detector, when using it, we must pay attention to the following matters:
1. Avoid violent impact and extrusion during use;
2. Charging should be done in a safe area, and it is strictly prohibited to charge in a flammable and explosive dangerous area;
3. It should be overhauled by specialized personnel or institutions. During maintenance, the models, specifications and parameters of the original circuit components shall not be changed;
4. Please use the special charger provided 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 give out a "di, di" sound prompt and automatically shut down, please use it after charging.
The gas detector has excellent sensitivity and excellent repeatability, and can be used in petroleum, chemical, environmental protection, metallurgy, refining, gas transmission and distribution, biochemical medicine, agriculture and other industries. Real-time detection in the environment of gases such as carbon monoxide, hydrogen sulfide and oxygen. In a dangerous environment, safety is no small matter, and it is necessary to take precautions before it happens. We must lay a good 120% spirit to ensure that there is no harmful gas leakage on site, and to achieve safe production.
