How to calibrate toxic and harmful gas detectors
There are many categories 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 industry and coal mining. It is especially necessary to conduct gas detection before entering a new environment. The gas detector can effectively detect the concentration of gas and ensure that we work in a safe environment!
Generally speaking, each sensor corresponds to a specific detection gas, but any kind of gas detector cannot be accurate and effective. Therefore, when selecting a gas sensor, you should try your best to understand the detection interference of other gases on the sensor 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 obtained and stored in the instrument. During measurement, the instrument compares the electrical signal generated by the gas concentration to be measured with the electrical signal of the standard concentration to calculate the accurate gas concentration value. Therefore, zeroing the instrument at any time and calibrating the instrument frequently are essential tasks to ensure accurate measurement. It should be noted that many current gas detectors can replace the detection sensors, but this does not mean that a detector can be equipped with different detector probes at any time.
Whenever a probe is replaced, in addition to the required sensor activation time, the instrument must be recalibrated. In addition, it is recommended that before using various instruments, the response test of the standard gas used for the instruments is carried out to ensure that the instruments truly play a protective role. If this type of instrument is used as a safety alarm in an open place, such as an open workshop, you can use a body-worn diffusion gas detector because it can continuously, real-time and accurately display the concentration of toxic and harmful gases on site. Fixed detectors are generally two-piece. The detection head composed of sensors and transmitters is installed as a whole at the detection site. The secondary instrument composed of circuits, power supplies and display alarm devices is installed as a whole in a safe place for easy monitoring. Its detection principle is the same as that described in the previous section, but its process and technology are more suitable for the continuous and long-term stability required for fixed detection.
In short, the calculation of the gas detector is a very complicated process, and we need to have a lot of patience during the detection process. Only with enough patience can we ensure that no problems will occur during the detection process. If you have any problems related to the use of the instrument, please contact our technical maintenance department in time.
