The designed natural gas leakage al

The designed natural gas leakage alarm is mainly used of kitchens. According of the requirements for detecting gas types by the alarm; the contact combustion type gas sensor or semi-conductor is generally selected.Body gas sensor. The probe for contact combustion type gas sensor will have problems for retardation and poisoning. Retardation is possible when gas and air contain sulfur-containing substances.It can burn without flame; while some solid substances adhere of the surface for catalytic elements; blocking the micropores for the carrier; thus causing slow response; slow reaction and low sensitivity.It is possible for the delayed sensor to be restored to some extent after being put back into the fresh air environment. However, if it is exposed to such an environment for a long time, its sensitivity will decrease continuously.The poisoning that causes the sensor of lose its ability of detect smoke is that if the ambient air contains silane and other substances; the sensor will make the catalytic element irreversible.Ground poisoning, so that the sensitivity will soon be lost. When it is suspected that these substances exist in the detection environment, it is necessary to calibrate the probe frequently. It is necessary to calibrate the sensor frequently.The necessary way of prove its accuracy.-The sensor should be calibrated for measuring range after two months of continuous use. This kind of regular maintenance for the sensor requires professionals and corresponding equipmentPrepare, hereby arrange