In addition to industrial waste gas, automobile exhaust is the main source of air pollution. The automotive industry must strictly comply with the international emission standards for automobile exhausts as required by regulations. National laws stipulate that emissions limits for registered vehicles must be measured for emissions of carbon monoxide, carbon dioxide and hydrocarbons.
All measuring instruments must be periodically calibrated using standard gases in accordance with national regulations. Shanghai Chen provides such calibration gas. For more information, please link to pure gas and standard gas.
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