butane flame methanometer

例句：

1. 1.The butane flame methanometer was used to measure the concentration of gases in the air.
   丁烷火焰测定仪被用来测量空气中气体的浓度。
2. 2.The butane flame methanometer was used to analyze the composition of the sample.
   丁烷火焰测定仪被用来分析样本的成分。
3. 3.The butane flame methanometer was used to detect any contaminants in the air.
   丁烷火焰测定仪被用来检测空气中的任何污染物。