气体计

例句：

1. 1. The gasometer is used to measure the concentration of carbon dioxide in the air.
   气体计用于测量空气中二氧化碳的浓度。
2. 2. The gasometer readings were used to determine the level of pollution in the area.
   气体计读数被用来确定该地区的污染水平。
3. 3.The gasometer was calibrated before each test to ensure accuracy.
   每次测试前，气体计都进行了校准，以确保准确性。