The gas detector, like other analytical instruments, is measured in a relatively comparative manner: the instrument is calibrated with a zero gas and a standard concentration of gas to obtain a standard curve stored in the instrument. , The instrument will be measured gas concentration generated by the electrical signal with the standard concentration of the electrical signal to calculate the exact gas concentration value. Therefore, at any time on the instrument calibration, regular calibration of the instrument is to ensure accurate measurement of the instrument essential work. It should be noted that: At present, many gas detectors are able to replace the detection of the sensor, but this does not mean that a detector can be equipped with a different detector probe at any time.
At any time when the probe is replaced, the instrument must be recalibrated in addition to a certain sensor activation time. In addition, it is recommended that the instrument in the use of gas detector before the instrument with the standard gas in response to the detection to ensure that the instrument really play a protective role. If you are using this type of instrument as a safety alarm in an open workplace, such as an open workplace, you can use a diffuse gas detector that is worn as it can display the concentration of toxic and harmful gases in the field continuously, in real time and accurately. Fixed detector is generally two-way, a sensor and transmission of the detection head is installed in the detection site, a circuit, power supply and display alarm device consisting of the second instrument as one installed in a safe place, easy to monitor. Gas detector detection principle with the previous section, only in the process and technology is more suitable for fixed detection required continuous, long time and stability characteristics.
In general, each sensor corresponds to a specific detection gas, but any kind of gas detector can not be absolutely special effects. Therefore, in the choice of a gas sensor, should be as much as possible to understand other gases on the detection of the sensor interference to ensure that it is accurate for a specific gas detection.