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SnO2由于城市大气中氮氧化物（NOx）的含量急剧增加，对人们的健康带来很大危害。为对环境中的NOx浓度进行监测、报警，用SnO2为基体材料，采用厚膜工艺，研制成NOx气体敏感元件，对NOx的选择性、灵敏性和响应特性均较好，颇有实用价值。
SnO2 is harmful to people’s health due to the rapid increase of nitrogen oxides (NOx) in the city’s atmosphere. In order to monitor and alarm the NOx concentration in the environment, SnO2 is used as a base material and a thick film process is used to develop a NOx gas sensing element, which has good selectivity, sensitivity and response characteristics to NOx, and is of practical value.