Selection of standard gas concentration range for toxic gases
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After selecting the model for our toxic gas detector, it is necessary to provide calibration gases. I checked, and it seems that the required concentration ranges for the standard gases of H2S, SO2, NH3, and CO are different. The current detection range is H2S 0-20PPM, SO2 0-100PPM, NH3 0-100PPM, CO 0-100PPM. What should be the appropriate concentration range for the calibration gas I need to choose? Also, what is the difference between N2 equilibrium and air equilibrium? Are there any requirements for choosing which type of balance to use? Since it’s a fairly standardized document, I’d like to seek everyone’s advice. Thank you!
For each toxic gas, since the concentrations at which they cause harm, the maximum allowable concentrations, and the concentrations permissible for short-term exposure vary from one gas to another, the measurement range of the detectors for each toxic gas also differs. The concentration range of the standard gases should be determined based on the measurement range of the detectors!