Gas detectors require frequent calibration and testing.
Gas detectors operate and measure using a relatively comparative method. First, a zero gas and a gas with a standard concentration are used to calibrate the gas detector. Toxic and harmful gas detectors are the same as other analytical gas detectors in this regard. A calibration curve is obtained and stored in the gas detector. During measurement, the gas detector compares the electrical signal generated by the concentration of the gas to be measured with the electrical signal of the standard concentration, and calculates to obtain an accurate gas concentration value.
Therefore, zeroing the gas detector at any time and regularly calibrating the gas detector are essential tasks to ensure the accuracy of the gas detector's measurement. It should be noted that currently, many gas detectors have replaceable detection sensors. However, 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 necessary activation time for the sensor, the gas detector must also be recalibrated. In addition, it is recommended that before using various gas detectors, a response test be carried out on the gas detector using standard gas to ensure that the gas detector can truly play a protective role.
