工作原理主要是利用氧化锆的电导特性来测量气体中的氧气浓度。马拉松一般型号F开头或者MMI开头，型号齐全，耐高温，但易碎，长度有600,800,1000,1200,2000可选择，直径规格25mmJinan is called "Quan Cheng（泉城）"and is coast in Chinese the east economic big province-Shandong the provincial capital of the province.Jinan is a whole province politics, economy, culture, science and technology, education and banking center.Jinan is also a national approval of the coast open city and vice- province class city.