How to choose a gas detector and how to use it
Gas conditions can not be identified by smell or vision, in order to avoid the operation of gas hazards, must rely on hazardous gases can be sensitive, correct and rapid response detection equipment to detect hazards, so the correct choice of gas detector has become an important issue is to enter the operation of the necessary part of the pre-hazard assessment.
Firstly, gas detectors can be divided into two types, fixed and portable, according to the occasion and mobility. In the use, portable gas detector used in inspection, detection of the plant may escape point gas concentration or emergency strain, which is characterised by lightweight, and can be measured in a short period of time to obtain the data; while the fixed gas detector is mostly used in factories for a long time to monitor, such as explosion-proof areas. Characterised by long-term monitoring, saving human resources.
Now the market supply of gas detectors for limited space, most of them are suitable for the determination of oxygen, explosive gases, carbon monoxide and hydrogen sulphide, because these hazardous gases are the most common, but the manufacturer of the instrument can not guarantee the applicability of the instrument. Therefore, the following aspects should be considered when selecting a detector: suitability, stability, calibration needs, protection requirements, and ease of identification.
After selecting a suitable instrument, the use of gas detectors also needs to pay attention to the following issues:
1. Pay attention to the regular calibration and testing
Gas detectors are measured by a relative comparison method: a zero gas and a standard concentration of gas are used to calibrate the instrument, a standard curve is obtained and stored in the instrument, and the accurate gas concentration value is calculated. Therefore, zeroing the instrument at any time and calibrating the instrument regularly are essential to ensure that the instrument measures accurately. It should be noted that: at present, many gas detectors can replace the detection sensor, but this does not mean that a detector can be used at any time with a different detector probe for detection.
2. Pay attention to the detection of interference between different sensors
Each sensor corresponds to a specific gas detection, but any one gas detector can not be special effects. Therefore, in the selection of a gas sensor, should be as much as possible to understand the other gases on the detection of the sensor interference, in order to ensure that it is the accurate detection of specific gases.
3. Pay attention to the concentration measurement range of the detection instrument
All types of gas detectors have their detection range, and different models have different range values. Only in its determination range to complete the measurement, in order to ensure that the instrument is accurate. If the measurement is done beyond the determination range for a long time, it may damage the safety of the sensor.
In conclusion, the body detector is a powerful tool to ensure industrial safety and staff health. We have to choose the right gas detector according to the specific use of environmental occasions and the functions needed. [...]
