Calibrating toxic and noxious gas detectors
There are many types of gas detectors, one of which is toxic and harmful gas detectors. Toxic and harmful gas detectors are mainly used in fields such as chemical and coal mining, especially before entering a new environment, it is necessary to perform gas detection. Gas detectors can effectively detect the concentration of gases, ensuring that we work in a safe environment!
Generally speaking, each sensor corresponds to a specific detection gas, but no gas detector can be special. Therefore, when selecting a gas sensor, efforts should be made to understand the detection interference of other gases on the sensor, in order to ensure its accurate detection of specific gases.
Toxic and harmful gas detectors, like other analytical and detection instruments, are measured using a relative comparison method: first, the instrument is calibrated with a zero gas and a standard concentration gas, and the standard curve is stored in the instrument. During the measurement, the instrument compares the electrical signal generated by the gas concentration to the electrical signal of the standard concentration, and calculates the accurate gas concentration value. Therefore, zeroing the instrument at any time and regularly calibrating the instrument are essential tasks to ensure accurate measurement. It should be noted that many gas detectors can currently replace their detection sensors, but this does not mean that a detector can be equipped with different detector probes at any time.
At any time, when replacing the probe, in addition to requiring a certain amount of sensor activation time, the instrument must also be recalibrated. In addition, it is recommended to conduct response testing on the standard gas used in various instruments before use to ensure that the instruments truly play a protective role. If this type of instrument is used as a safety alarm in an open environment, such as an open workshop, a portable diffusion gas detector can be used because it can continuously, real-time, and accurately display the concentration of toxic and harmful gases on site. A fixed detector is generally a two-piece type, with a detection head consisting of a sensor and a transmitter installed as a whole on the testing site. A secondary instrument consisting of a circuit, power supply, and display alarm device is installed as a whole in a safe place for easy monitoring. Its detection principle is the same as described in the previous section, but it is more suitable for the continuous, long-term stability and other characteristics required for fixed detection in terms of process and technology.
The calculation of the detector is a very complex process, which requires us to have great patience. Only with enough patience can we ensure that there will be no problems during the detection process
