How to choose toxic and harmful gas detector in industrial environment
1. According to the selection of gas detection objects
We should know the type and concentration range of the gas to be detected. The gas produced by different production processes and links in the production department is also different, sometimes one, but it is also possible. The appropriate gas detector should be selected according to the situation occurring. If you want to prioritize detection of carbon monoxide and hydrogen sulfide, we must consider using gas detectors as a priority to ensure the safety of personnel. If the concentration of toxic and harmful gases is relatively low, such as halogenated hydrocarbons, aromatic hydrocarbons, rice, alcohol, amine and other gases, other gas detectors should be selected.
2. When choosing a gas detector, you should also pay attention to the following aspects:
1). Pay attention to routine calibration and testing, and use relative comparison method to measure and evaluate toxic and harmful gas detectors. First, the instrument is calibrated with zero gas and standard concentration gas, and a standard curve is obtained and stored in the device. The instrument compares the electrical signal formed by the concentration change of the target gas with the concentration of the standard curve, so as to calculate the accurate gas concentration value. Therefore, before using the gas detector and after replacing the sensor, the instrument must be calibrated to ensure that the instrument plays a protective role in the use of the instrument.
2). The main detection interference of different gases on the sensor. Generally speaking, each sensor can only correspond to a specific gas, but any gas detector cannot be absolutely special. It is necessary to understand the effects of other gases on the sensor as much as possible. Detect interference to ensure its accurate detection of the target gas.
3). Attention should be paid to the life of the sensor: Generally speaking, the life of a portable gas detector equipped with an LEL sensor is longer, up to about three years; some can be up to four years or longer; the life of an electrochemical sensor for a gas is relatively Shorter, generally up to one to two years.
4). Attention should be paid to the concentration range of the gas detector: when the gas is detected, its accuracy can only be guaranteed within its measurement range. If it exceeds the measurement range for a long time, it will cause fatal damage to the sensor and greatly shorten the use of the sensor Life; Toxic and harmful gas detectors that work at high concentrations for a long time will also cause damage.
3. Selection according to the site environment
Different industrial environments have different types of gas detectors. In the production process and industrial installations, many gas detectors are used. Generally, fixed gas detectors are used, which can be installed on certain detection points. According to user requirements, they can be Choose a gas detector that does not alarm or does not alarm, and can also be selected and judged according to the type and concentration of on-site gas detection.
At the same time, the position and height of the fixed gas detector should be selected according to the characteristics of the target gas in order to achieve a good monitoring effect. The application of portable gas detectors in various industrial and mining enterprises, environmental governance and health departments is becoming more and more extensive. Wearable diffusion gas detectors can be selected in open working environments because they can continuously, accurately and real-time display The concentration of toxic and harmful gases at the site.
If you enter a closed workplace, before personnel enter, the internal closed space must be tested in the external space. At this time, it is necessary to use a pump-suction gas detector for sampling. The portable gas detector is easy to operate, small and portable. Staff can take it with them. General portable gas detector can work continuously for 12 hours.
