What Points Should Be Taken Into Account When Choosing Toxic Gas Detectors?
1. Fixed gas detector: This is a commonly used detector in industrial equipment and production processes.
It can be installed at specific detection points to detect specific gas leaks.
Its detection principle is as described in the previous section, but it is more suitable for the continuous and long-term stability required for fixed detection in terms of process and technology.
They also need to be selected based on the type and concentration of the gas on site, and attention should be paid to installing them in the most likely leak location of specific gases, such as selecting the most effective height for sensor installation based on the specific gravity of the gas, and so on.
2. Portable gas detector: Due to its convenient operation, compact size, built-in sampling pump, fast detection speed, and high accuracy, the portable instrument is easy to use; It can be carried to different places for testing and can be used as soon as it is turned on. As such instruments are increasingly being used in various factories and health departments.
3. Pay attention to the detection interference between different sensors
Generally speaking, each sensor corresponds to a specific gas being detected, but no gas detector can be absolutely effective.
Therefore, when choosing a gas sensor, it is important to understand as much as possible the detection interference of other gases on the sensor to ensure accurate detection of specific gases.
3, Pay attention to the lifespan of various sensors:
All types of gas sensors have a certain service life, that is, lifespan.
Generally speaking, in portable instruments, the lifespan of LEL sensors can be used for about three years;
The lifespan of electrochemical specific gas sensors is generally two to three years;
The lifespan of electrochemical sensors depends on the drying of the electrolyte, so if they are not used for a long time, sealing them in a lower temperature environment can extend their service life to a certain extent.
Therefore, sensors should be tested at all times and used within their effective period as much as possible. Once they fail, they should be replaced in a timely manner.
4, Pay attention to the concentration measurement range of the testing instrument:
All types of toxic and harmful gas detectors have their fixed detection range.
Only by completing the measurement within its measuring range can the instrument ensure accurate measurement.
However, measuring beyond the measurement range for a long time may cause permanent damage to the sensor.
For example, in the range of 0-100ppm, if accidentally used in an environment exceeding 100ppm, it may completely burn out the sensor. So, before purchasing instruments, it is important to confirm your own range and range.
